Document And Entity Information
Expected Dividend Yield
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Note To Financial Statement Details Textual
Significant Accounting Policies
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
Note 2 - Summary of Significant Accounting Policies
us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Expected benefit
Note 3 - Investments
Risk-Free Interest Rates
Note 4 - Leases
Note 5 - Property and Equipment, Net
Note 6 - Fair Value Measurement
Note 7 - Stockholders' Equity
Liabilities, Noncurrent [Abstract]
Lessee, Operating and Finance Leases Disclosure [Text Block]
The entire disclosure for operating and finance leases of lessee.
Note 9 - Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans
Note 10 - Income Taxes
Income Tax Disclosure [Text Block]
Note 11 - Net Loss Per Share
Note 2 - Summary of Significant Accounting Policies - Summary of Warranty Provision (Details)
Net unrealized gain
Net change in available-for-sale marketable securities
Note 2 - Summary of Significant Accounting Policies - Revenue by Geographic Area (Details)
Note 2 - Summary of Significant Accounting Policies - Revenue by Product (Details)
Expected Volatility
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 3 - Investments - Schedule of Investments (Details)
Note 4 - Leases - Schedule of Balance Sheet Presentation of Operating and Finance Leases (Details)
Note 4 - Leases - Schedule of Balance Sheet Presentation of Operating and Finance Leases (Details) (Parentheticals)
Austin, Texas [Member]
Information related to Austin, Texas.
Note 4 - Leases - Schedule of Future Minimum Lease Payments (Details)
Note 4 - Leases - Schedule of Other Information (Details)
Available-for-sale securities:
Expected Option Life (in years) (Year)
Note 5 - Property and Equipment - Schedule of Property and Equipment (Details)
Note 6 - Fair Value Measurement - Schedule of Fair Value Measurement of Financial Instruments (Details)
Note 7 - Stockholders' Equity - Schedule of Warrant Activity (Details)
Note 9 - Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans - Stock Option Activity Summary (Details)
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]
astc_OperatingAndFinanceLeasesOperatingRightofuseAssets
Total lease assets
Amount of the lessee's operating and finance lease, operating right-of-use assets.
Note 9 - Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans - Stock Options Outstanding (Details)
Assets:
Lessee's operating and finance lease, right-of-use assets.
Note 9 - Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans Compensation - Restricted Stock Activity (Details)
Liabilities:
Lessee's operating and finance lease, liabilities.
Note 9 - Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans - Schedule of Share-Based Compensation Expense (Details)
astc_OperatingAndFinanceLeasesLiabilities
Total lease liabilities
Amount of the lessee's operating and finance lease liabilities.
Note 9 - Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans - Schedule of Share-based Compensation Fair Value (Details)
Note 10 - Income Taxes - Schedule of Components of Income Tax Benefit (Details)
Research And Development Facility [Member]
Represents lease for a research and development facility.
Note 10 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Note 10 - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details)
Note 10 - Income Taxes - Rollforward of Beginning and Ending Amount of Unrecognized Tax Benefits (Details)
Lessee, Operating and Financing Leases, Liability, Maturity [Table Text Block]
Tabular disclosure of undiscounted cash flows of lessee's operating and finance lease liabilities. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.
Note 11 - Net Loss Per Share - Schedule of Basic and Diluted Earnings Per Share (Details)
Granted (in dollars per share)
Granted, weighted average grant date fair value (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Vested, weighted average grant date fair value (in dollars per share)
Notes To Financial Statements
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
Canceled or expired (in dollars per share)
Notes To Financial Statements [Abstract]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Outstanding, weighted average grant date fair value (in dollars per share)
Outstanding, weighted average grant date fair value (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Canceled or expired (in shares)
Schedule of Balance Sheet Presentation of Operating and Finance Leases [Table Text Block]
Tabular disclosure of the balance sheet presentation of the operating and finance leases.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Outstanding (in shares)
Outstanding (in shares)
2026
Amount of lessee's undiscounted obligation for lease payment for operating and finance leases to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
2027
Amount of lessee's undiscounted obligation for lease payment for operating and finance leases to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
2028
Amount of lessee's undiscounted obligation for lease payment for operating and finance leases to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested (in shares)
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
astc_LesseeOperatingAndFinanceLeaseLiabilitiesUndiscountedExcessAmount
Imputed interest
Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating and finance leases.
astc_LesseeOperatingAndFinanceLeasesLiabilities
Present value of net minimum lease obligations
Present value of lessee's discounted obligation for lease payments from operating and finance leases.
2029
Amount of lessee's undiscounted obligation for lease payment for operating and finance leases to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
astc_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue
Total lease obligations
Amount of lessee's undiscounted obligation for lease payment for operating and finance leases.
Furniture, Fixtures, Equipment, and Leasehold Improvements [Member]
Represents furniture, fixtures, equipment & leasehold improvements.
Exercised (in shares)
Number of warrants or rights exercised in period.
Grant [Member]
Issued (in shares)
Number of warrants or rights issued.
Lessee, Operating and Finance Leases, Weighted Average Lease Term And Discount Rate [Table Text Block]
Tabular disclosure for lessee's operating and finance leases weighted average lease term and discount rate.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Weighted-average grant-date fair value of options awarded (in dollars per share)
Outstanding, Aggregate Fair Market Value
Represents the aggregate fair market value of outstanding warrants or rights.
Issued, Aggregate Fair Market Value
The weighted average fair value for warrants or rights issued during the period.
Exercised, Aggregate Fair Market Value
The weighted average fair value for warrants or rights exercised during the period.
us-gaap_PaymentsForProceedsFromShortTermInvestments
Proceeds from short-term investments
Canceled or expired (in shares)
Number of warrants or rights which expired during the period.
Issued, Weighted Average Exercise Price (in dollars per share)
Exercise price per share or per unit of warrants or rights issued.
Exercised, Weighted Average Exercise Price (in dollars per share)
Exercise price per share or per unit of warrants or rights exercised.
Canceled or expired, Weighted Average Exercise Price (in dollars per share)
Exercise price per share or per unit of warrants or rights expired in period.
Class of Warrant or Rights, Warrants Issued March 26, 2020 [Member]
Represents the date the warrants or rights were issued.
Financial Instruments [Domain]
Class of Warrant or Rights, Warrants Issued March 30, 2020 [Member]
Represents the date the warrants or rights were issued.
Class of Warrant or Rights, Warrants Issued October 23, 2020 [Member]
Represents the date the warrants or rights were issued.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Outstanding, weighted average grant date fair value (in dollars per share)
Outstanding, weighted average grant date fair value (in dollars per share)
Canceled or expired, Aggregate Fair Market Value
The weighted average fair value for warrants or rights expired during the period.
Outstanding, Weighted Average Remaining Contractual Term (Year)
Weighted average remaining contractual term of outstanding warrants or rights.
Canceled or expired, weighted average grant date fair value (in dollars per share)
Financial Instrument [Axis]
Granted, weighted average grant date fair value (in dollars per share)
Exercised, weighted average grant date fair value (in dollars per share)
Class of Warrant or Rights, Warrants Issued October 28, 2020 [Member]
Represents the date the warrants or rights were issued.
Class of Warrant or Rights, Warrants Issued February 16, 2021 [Member]
Represents the date the warrants or rights were issued.
Payroll related accruals
Class of Warrant or Rights, Warrants Issued April 12, 2021 [Member]
Represents the date the warrants or rights were issued.
Accounts payable
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Outstanding (in shares)
Outstanding (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
Canceled or expired (in shares)
Finance lease expenditures incurred but not paid for as of the end of the period
astc_NumberOfCustomers
Number Of Customers
Represents the number of customers.
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_PaymentsToAcquireIntangibleAssets
Purchases of intangible assets
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of property and equipment
Acquisition of equipment/ software through financing lease
Exercise Price Range 1 [Member]
Represents exercise range 1.
Exercise Price Range 2 [Member]
Represents exercise price range 2.
Weighted average common shares outstanding:
Liabilities, Current [Abstract]
Donley Facilities [Member]
The Donley Facilities.
us-gaap_IncreaseDecreaseInOperatingLeaseLiability
Operating lease liabilities
Exercise Price Range 3 [Member]
Represents exercise price range 3.
Product [Member]
Exercise Price Range 4 [Member]
Represents exercise range 4.
us-gaap_Assets
Total assets
Plan Name [Axis]
Plan Name [Domain]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount
Compensation and Employee Benefit Plans [Text Block]
Metric Facility [Member]
The metric facility.
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
Investment [Text Block]
Share-Based Payment Arrangement [Text Block]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Business Description and Basis of Presentation [Text Block]
Award Type [Domain]
Award Type [Axis]
Net loss
Net loss
Net loss
Intangible assets, net
Restricted Stock [Member]
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Commitments and Contingencies Disclosure [Text Block]
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Accumulated depreciation
Property, Plant and Equipment, Net
Property and equipment, net
Property Plant And Equipment, Gross
Cash flows from investing activities:
Debt Securities, Available-for-sale
Debt Securities, Available-for-sale, Fair Value
us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Other assets and liabilities
Basic and diluted net loss per common share:
Earnings Per Share [Text Block]
Income taxes payable
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
us-gaap_IncomeTaxExpenseBenefit
Income tax expense
Total income expense
us-gaap_IncreaseDecreaseInAccountsPayable
Accounts payable
Operating Expenses
Total operating expenses
Cash and cash equivalents
us-gaap_AllocatedShareBasedCompensationExpense
Share-Based Payment Arrangement, Expense
us-gaap_DefinedBenefitPlanContributionsByEmployer
Defined Benefit Plan, Plan Assets, Contributions by Employer
Amendment Flag
Other comprehensive loss, net of tax:
us-gaap_ComprehensiveIncomeNetOfTax
Total comprehensive loss
City Area Code
New Accounting Pronouncements, Policy [Policy Text Block]
us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures
Cancellation of restricted stock
Purchase of treasury stock (in shares)
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Common stock, outstanding (in shares)
Preferred stock, shares outstanding (in shares)
Current Fiscal Year End Date
Operating leases
Document Fiscal Period Focus
Document Fiscal Year Focus
Consolidation, Policy [Policy Text Block]
Document Period End Date
Operating leases (Year)
Entity File Number
Entity Emerging Growth Company
Document Type
Entity Small Business
Entity Shell Company
Document Information [Line Items]
Document Information [Table]
Purchased Software [Member]
Represents purchased software.
Service [Member]
us-gaap_AreaOfRealEstateProperty
Area of Real Estate Property (Square Foot)
Entity Public Float
Entity Filer Category
Entity Current Reporting Status
Entity Voluntary Filers
Entity Well-known Seasoned Issuer
us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Impairment, Long-Lived Asset, Held-for-Use
Short-Term Investments [Member]
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
Entity Tax Identification Number
Entity Central Index Key
us-gaap_DepreciationAndAmortization
Depreciation, Depletion and Amortization, Nonproduction
Insider Trading Policies and Procedures [Line Items]
Entity Registrant Name
ecd_InsiderTrdPoliciesProcAdoptedFlag
Insider Trading Policies and Procedures Adopted [Flag]
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
Entity Address, Address Line One
us-gaap_TreasuryStockValueAcquiredCostMethod
Treasury Stock, Value, Acquired, Cost Method
Purchase of treasury stock
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Entity Address, Postal Zip Code
Supplemental disclosures of cash flow information:
us-gaap_TreasuryStockCommonValue
Treasury shares, 10,316 shares at June 30, 2025 and 2024, respectively
Entity Address, State or Province
Concentration Risk Type [Axis]
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Concentration Risk Type [Domain]
Material Terms of Trading Arrangement [Text Block]
Lease liability - current and non-current
Deferred tax assets lease liability
Entity Common Stock, Shares Outstanding
Trading Arrangements, by Individual [Table]
astc_IncomeTaxReconciliationExpirationOfNetOperatingLossCarryovers
Expiration of net operating loss carryovers
Represents the income tax reconciliation for expiring net operating loss carryforwards.
Revenue Benchmark [Member]
Accounts Receivable [Member]
astc_OperatingLeaseMonthlyRent
Operating Lease, Monthly Rent
Amount of monthly rent under operating lease.
us-gaap_IncreaseDecreaseInInventories
Inventory, net
Trading Symbol
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Reverse Stock Split [Member]
The conversion of a reverse stock split where there is a reduction in the shares outstanding.
Local Phone Number
us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Exercised (in shares)
us-gaap_TableTextBlock
Notes Tables
us-gaap_GainLossOnDispositionOfAssets1
Loss on disposal of asset
us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
Cancellation of restricted stock (in shares)
Restricted stock issuance (in shares)
Restricted stock issuance
IRC Section 174 R&D Expense Capitalization
Amount before allocation of valuation allowances of deferred tax asset attributable to capitalized research and development.
Common Stock Outstanding [Member]
Represents common stock outstanding.
Stock-based compensation (in shares)
Class Of Warrant Or Right, Expiration Date
Selling, general and administrative
Stock-based compensation
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Granted (in shares)
Granted (in shares)
Granted (in shares)
Raw materials
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders’ equity
us-gaap_CashUninsuredAmount
Cash, Uninsured Amount
Finished goods
Work-in-process
Reported Value Measurement [Member]
UNITED STATES
Research and development
Research and Development Expense
Accumulated deficit
Accumulated other comprehensive loss
astc_TaxCutsAndJobsActOf2017LimitsOnUtilizationOfNetOperatingLossToTaxableIncomePercentage
Tax Cuts and Jobs Act of 2017, Limits on Utilization of Net Operating Loss to Taxable Income Percentage
Tax cuts and jobs act of 2017 limits on utilization of net operating loss to taxable income percentage.
astc_UnrecognizedTaxBenefitsResultingInNetStateOperatingLossCarryforwards
Unrecognized Tax Benefits Resulting in Net State Operating Loss Carryforwards
Represents the unrecognized tax benefits resulting in net state operating loss carryforwards.
astc_UnrecognizedTaxEffectOnTexasBusinessLossCarryforwards
Unrecognized Tax Effect on Texas Business Loss Carryforwards
Represents the unrecognized tax effect on Texas business loss carryforwards.
astc_InterestExpenseForUncertainTaxPositions
Interest Expense For Uncertain Tax Positions
Interest expense for uncertain tax positions.
astc_FederalOperatingLossCarryforwardsAvailable
Federal Operating Loss Carryforwards Available
Federal Operating Loss Carryforwards Available
Changes in assets and liabilities
astc_UnrecognizedTaxBenefitsResultingInNetOperatingLossCarryforwardOne
Unrecognized Tax Benefits Resulting in Net Operating Loss Carryforward One
Amount of an unrecognized tax benefit that is directly related to a position taken in a tax year that results in a net operating loss carryforward. This amount is presented as a reduction of the related deferred tax asset in the balance sheet if that deferred tax asset is not used. This amount is presented separately from the deferred tax asset for a net operating loss carryforward if this unrelated tax benefit is associated with a different tax position.
Indefinite Lives [Member]
represents indefinite lives.
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Lease liabilities - non-current, Operating Leases
Operating lease obligations
2030
Amount of lessee's undiscounted obligation for lease payment for operating and finance leases to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]
Thereafter
Amount of lessee's undiscounted obligation for lease payment for operating and finance leases due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
Corporate & Government Debt Mutual Funds Securities [Member]
Represents Corporate & Government Debt Mutual Funds Securities.
Corporate & Government Debt ETFs Securities [Member]
Represents Corporate & Government Debt ETFs Securities.
us-gaap_OperatingLeaseLiability
Present value of net minimum lease obligations, Operating Leases
Operating lease obligations
Lease liabilities - current
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]
Financing lease obligations
Lease liabilities - current
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]
Lease liabilities - non-current, Financing Leases
Financing lease obligations
Subsequent Events [Text Block]
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]
Operating lease assets
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Lessee, Operating Lease, Liability, to be Paid
Total lease obligations, Operating Leases
us-gaap_FinanceLeasePrincipalPayments
Finance Lease, Principal Payments
Repayments on finance lease liabilities
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Imputed interest, Operating Leases
us-gaap_FinanceLeaseLiability
Present value of net minimum lease obligations, Financing Leases
us-gaap_DeferredIncomeTaxExpenseBenefit
Total deferred tax benefit/ (expense)
2028, Operating Leases
2029, Operating Leases
Financing lease assets
2030, Operating Leases
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Thereafter, Operating Leases
Net Investment in Lease, before Allowance for Credit Loss
Non-cash financing activities:
Fair Value of Financial Instruments, Policy [Policy Text Block]
2026, Operating Leases
Debt Securities, Available-for-Sale [Table Text Block]
2027, Operating Leases
Segment Reporting, Policy [Policy Text Block]
Foreign Currency Transactions and Translations Policy [Policy Text Block]
us-gaap_ShareBasedCompensation
Stock-based compensation
Other assets, net
Lessee, Leases [Policy Text Block]
Earnings Per Share, Policy [Policy Text Block]
us-gaap_Revenues
Revenues
Operating expenses:
Income Tax, Policy [Policy Text Block]
Internal Use Software, Policy [Policy Text Block]
us-gaap_LesseeOperatingLeaseTermOfContract
Lessee, Operating Lease, Term of Contract (Month)
Research and Development Expense, Policy [Policy Text Block]
Financial instrument, long-term investments
Depreciation
us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Stockholders' Equity Note, Stock Split, Conversion Ratio
us-gaap_AssetsCurrent
Total current assets
Share-Based Payment Arrangement [Policy Text Block]
Equity [Text Block]
Treasury stock, shares (in shares)
Common stock, $0.001 par value, 250,000,000 shares authorized at June 30, 2025 and 2024 respectively; 1,769,269 and 1,712,045 shares issued at June 30, 2025 and 2024 respectively; 1,758,953 and 1,701,729 shares outstanding at June 30, 2025 and 2024, respectively
Adjustments to reconcile net loss to net cash used in operating activities:
Common stock, authorized (in shares)
Common stock, issued (in shares)
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share (in dollars per share)
Stockholders' Equity, Policy [Policy Text Block]
us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount
Standard Product Warranty, Policy [Policy Text Block]
us-gaap_DeferredTaxAssetsValuationAllowance
Less - valuation allowance
us-gaap_OperatingLeasePayments
Operating Lease, Payments
Product and Service [Axis]
Product and Service [Domain]
us-gaap_DeferredTaxAssetsNet
Net deferred tax assets
Convertible preferred stock, $0.001 par value, 2,500,000 shares authorized; 280,898 shares of Series D issued and outstanding at June 30, 2025 and 2024, respectively
Net deferred tax assets
Preferred stock, shares issued (in shares)
Preferred Stock, Shares Issued (in shares)
Cash paid for interest
Income taxes paid
Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]
Geographical [Axis]
Property, Plant and Equipment Disclosure [Text Block]
Geographical [Domain]
Property, Plant and Equipment [Table Text Block]
us-gaap_DeferredTaxAssetsGross
Total gross deferred tax assets
Preferred stock, shares authorized (in shares)
us-gaap_DeferredIncomeTaxLiabilities
Total gross deferred tax liabilities
Subleased Facility [Member]
Represents the subleased facility.
CALIFORNIA
Portion at Fair Value Measurement [Member]
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share (in dollars per share)
Estimate of Fair Value Measurement [Member]
Revenue
Revenue
us-gaap_InventoryValuationReserves
Inventory Valuation Reserves
Measurement Basis [Axis]
Unrealized loss on securities
Fair Value, Inputs, Level 3 [Member]
us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Gain (Loss), Foreign Currency Transaction, before Tax
Fair Value Hierarchy and NAV [Domain]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 2 [Member]
Property and equipment, principally due to differences in depreciation
Fair Value Hierarchy and NAV [Axis]
Accrued expenses and other timing
Software and Software Development Costs [Member]
Inventory, net:
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property, Plant and Equipment, Useful Life (Year)
Construction in Progress [Member]
Cash flows from operating activities:
Revenue [Policy Text Block]
Statement [Line Items]
us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accounts Receivable, Allowance for Credit Loss, Current
Accounts receivable
us-gaap_StandardProductWarrantyAccrual
Balance
Balance
us-gaap_StandardProductWarrantyAccrualPayments
Settlements made
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Stock-based compensation
Additional paid-in capital
Accrued expenses and other liabilities, net of current portion
Noncurrent portion of amount of expenses incurred but not yet paid nor invoiced, and liabilities classified as other.
Accruals for new warranties issued
Short-term investments
AOCI Attributable to Parent [Member]
Schedule of Product Warranty Liability [Table Text Block]
Stockholders’ equity
Financial instrument, short-term investments
Property, Plant and Equipment, Policy [Policy Text Block]
Long-Lived Tangible Asset [Axis]
us-gaap_NonoperatingIncomeExpense
Other income and expense, net
Long-Lived Tangible Asset [Domain]
Tax credit carryforwards
Net operating loss carryforwards
us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
Deferred Tax Assets, Operating Loss Carryforwards, State and Local
Current assets
Fair Value Disclosures [Text Block]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Inventory, Policy [Policy Text Block]
Assets [Abstract]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net change in cash and cash equivalents
Deferred tax assets:
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash used in financing activities
us-gaap_Liabilities
Total liabilities
Commitments and contingencies (Note 13)
us-gaap_OperatingIncomeLoss
Loss from operations
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash used in operating activities
us-gaap_DeferredTaxLiabilities
Deferred Tax Liabilities, Net, Total
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash provided by (used in) investing activities
Prepaid expenses and other current assets
Cost of revenue
us-gaap_GrossProfit
Gross profit
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
us-gaap_DeferredTaxLiabilitiesLeasingArrangements
Right-of-use assets
Investment, Policy [Policy Text Block]
us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Property and equipment, principally due to differences in depreciation
Deferred tax liabilities:
Operating right-of-use assets
Represents the amount of operating right-of-use reported under supplemental cash flow information.
Operating right-of-use interest
Represents the amount of operating right-of-use interest reported under non-cash financing activities.
Operating right-of-use associated liabilities
Represents Operating lease right-of-use asset associated liabilities reported under supplemental cash flow information.
Retained Earnings [Member]
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Current State and Local Tax Expense (Benefit)
State and local
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
State and local
us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations
State tax expense
Treasury Stock, Common [Member]
Additional Paid-in Capital [Member]
us-gaap_CurrentFederalTaxExpenseBenefit
Federal
Preferred Stock [Member]
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Federal
Equity Components [Axis]
Equity Component [Domain]
us-gaap_CurrentIncomeTaxExpenseBenefit
Total current tax expense
Outstanding, Weighted Average Exercise Price (in dollars per share)
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share)
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share)
us-gaap_ClassOfWarrantOrRightOutstanding
Outstanding (in shares)
Outstanding (in shares)
Outstanding (in shares)
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Loss from operations before income taxes
us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)
ICFR Auditor Attestation Flag
astc_LesseeOperatingLeasesTenantAllowance
Lessee, Operating Leases, Tenant Allowance
Represents the amount of tenant allowance for an operating lease.
State and Local Jurisdiction [Member]
Income Tax Jurisdiction [Axis]
Operating and Finance Leases, Liability, Noncurrent
Lease liabilities - non-current
Present value of lessee's discounted obligation for lease payments from operating and finance lease, classified as noncurrent.
Income Tax Jurisdiction [Domain]
Disaggregation of Revenue [Table Text Block]
Domestic Tax Jurisdiction [Member]
Operating and Finance Leases, Liability, Current
Lease liabilities - current
Present value of lessee's discounted obligation for lease payments from operating and finance leases, classified as current.
Document Annual Report
Accounts Receivable [Policy Text Block]
Cash and Cash Equivalents, Policy [Policy Text Block]
Statement of Financial Position Location, Balance [Axis]
Statement of Financial Position Location, Balance [Domain]
Entity Incorporation, State or Country Code
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits
Balance
Balance
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
Document Transition Report
Document Financial Statement Error Correction [Flag]
Concentration Risk Disclosure [Text Block]
Selling, General and Administrative Expenses [Member]
Entity Interactive Data Current
Additions for tax positions of prior years
Security Exchange Name
us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Decreases for tax positions of prior years
Additions for tax positions of current period
Title of 12(b) Security
Research and Development Expense [Member]
Statement of Income Location, Balance [Axis]
Statement of Income Location, Balance [Domain]
Nonmonetary Transaction Type [Domain]
us-gaap_ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration]
Tax Period [Domain]
Nonmonetary Transaction Type [Axis]
Auditor Name
Accrued expenses and other liabilities
Tax Period [Axis]
Auditor Firm ID
astc_IncreaseDecreaseInFinancingLiabilityInConnectionWithInternaluseSoftwareFinancingActivities
Repayment of financing liability in connection with internal-use software
Represents the increase or decrease from the repayment of financing liabilities in connection with internal-use software presented under financing activities.
Auditor Location
astc_IncreaseDecreaseInFinancingLiabilityInConnectionWithInternaluseSoftwareOperatingActivities
Repayment of financing liability in connection with internal-use software
Represents the increase or decrease from the repayment of financing liabilities in connection with internal-use software presented in operating activities.
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Non-US [Member]
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
us-gaap_OperatingLossCarryforwardsValuationAllowance
Operating Loss Carryforwards, Valuation Allowance
Statement [Table]
Statement of Financial Position [Abstract]
Basic and diluted (in shares)
Denominator for basic and diluted net loss per share — weighted average common stock outstanding (in shares)
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective Income Tax Rate Reconciliation, Percent
Net loss per common share (in dollars per share)
Net loss (in dollars per share)
Credit Loss, Financial Instrument [Policy Text Block]
Statement of Cash Flows [Abstract]
Lease Contractual Term [Domain]
Statement of Stockholders' Equity [Abstract]
Lease Contractual Term [Axis]
Income Statement [Abstract]
Revenue from External Customers by Geographic Areas [Table Text Block]
Interest on financing leases
us-gaap_FinanceLeaseLiabilityPaymentsDue
Total lease obligations, Financing Leases
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
us-gaap_FinanceLeaseRightOfUseAssetAmortization
Finance Lease, Right-of-Use Asset, Amortization
2030, Financing Leases
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Thereafter, Financing Leases
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount
Imputed interest, Financing Leases
2026, Financing Leases
2027, Financing Leases
2028, Financing Leases
2029, Financing Leases
srt_StockRepurchaseProgramAuthorizedAmount1
Share Repurchase Program, Authorized, Amount
Financing leases
Liabilities, Noncurrent
Asset Acquisition, Contingent Consideration, Liability, Current
Financing leases (Year)
Cash flows from financing activities:
us-gaap_IncomeTaxReconciliationOtherReconcilingItems
Other permanent items
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Rights Plan [Member]
Relating to the Rights Plan.
us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes
Prior year true-up
us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Change in valuation allowance
us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount
Stock-based compensation
Series D Preferred Stock [Member]
Amortization of operating lease right-of-use assets
us-gaap_StockholdersEquity
Total stockholders’ equity
Balance
Balance
Class of Stock [Axis]
Class of Stock [Domain]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Debt Securities, Available-for-sale, Unrealized Loss
Outstanding, Weighted Average Exercise Price (in dollars per share)
us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
Debt Securities, Available-for-sale, Unrealized Gain
Weighted average remaining contractual life (Year)
Shares Exercisable (in shares)
Exercisable, Weighted Average Exercise Price (in dollars per share)
Outstanding, exercise prices range upper (in dollars per share)
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share)
astc_NumberofLeasedWhollyOwnedSubsidiaries
Number of Wholly Owned Subsidiaries
Represents the number of subsidiaries to which ATI licenses AMS Technology.
Tax credits
Debt Securities, Available-for-sale, Adjusted Cost
Number outstanding (in shares)
Exercise Price Range [Axis]
Exercise Price Range [Domain]
astc_NumberofPatentsGranted
Number of Patents Granted
Represents the number of patents granted.
Outstanding, exercise prices range lower limit (in dollars per share)
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in dollars per share)