Entity Central Index Key This element represents the carrying value of the mutual funds. Held-to-maturity Securities, Debt Maturities, after One Through Three Years, Net Carrying Amount Held-To-Maturity Securities, Debt Maturities, 91 To 360 Days, Net Carrying Amount Held-To-Maturity Securities, Debt Maturities, Over 360 Days, Net Carrying Amount This element represents amount of fair value for mutual funds. Held-to-maturity Securities, Debt Maturities, after One Through Three Years, Fair Value Held-To-Maturity Securities, Debt Maturities, 91 To 360 Days, Fair Value Held-To-Maturity Securities, Debt Maturities, Over 360 Days, Fair Value Document and entity information. Document And Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Trading Symbol Trading Symbol Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Statement Of Financial Position [Abstract] Assets Assets [Abstract] Current assets Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Short-term investments Available For Sale Securities Current Accounts receivable, net of allowance Accounts Receivable Net Current Inventory, net Inventory Net Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Long-term investments Available For Sale Securities Noncurrent Other assets, net Other Assets Noncurrent Total assets Assets Liabilities and stockholders’ equity Liabilities And Stockholders Equity [Abstract] Current liabilities Liabilities Current [Abstract] Accounts payable Accounts Payable Current Payroll related accruals Employee Related Liabilities Current Accrued liabilities and other Accrued Liabilities Current Income tax payable Accrued Income Taxes Current Total current liabilities Liabilities Current Other liabilities Other Liabilities Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 13) Commitments And Contingencies Stockholders’ equity Stockholders Equity [Abstract] Preferred stock, no par value, convertible, 2,500,000 shares authorized, no shares issued and outstanding, at March 31, 2018 and June 30, 2017, respectively Preferred Stock Value Common stock, no par value, 15,000,000 shares authorized; 4,505,473 and 4,508,509 shares issued at March 31, 2018 and June 30, 2017, respectively; 4,107,538 and 4,111,281 shares outstanding at March 31, 2018 and June 30, 2017, respectively Common Stock Value Treasury stock, 397,935 and 397,228 shares at cost at March 31, 2018 and June 30, 2017, respectively Treasury Stock Value Additional paid-in capital Additional Paid In Capital Accumulated deficit Retained Earnings Accumulated Deficit Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Total stockholders’ equity Stockholders Equity Total liabilities and stockholders’ equity Liabilities And Stockholders Equity Preferred stock, par value (in dollars per share) Preferred Stock No Par Value Preferred stock, shares authorized (in shares) Preferred Stock Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock Shares Outstanding Common stock, par value (in dollars per share) Common Stock No Par Value Common stock, shares authorized (in shares) Common Stock Shares Authorized Common stock, shares issued (in shares) Common Stock Shares Issued Common stock, shares outstanding (in shares) Common Stock Shares Outstanding Treasury stock, shares at cost (in shares) Treasury Stock Shares Income Statement [Abstract] Revenue Revenues Cost of revenue Cost Of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Selling, general and administrative Selling General And Administrative Expense Research and development Research And Development Expense Total operating expenses Operating Expenses Loss from operations Operating Income Loss Interest and other income, net Nonoperating Income Expense Loss before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax benefit Income Tax Expense Benefit Net loss Profit Loss Less: Net loss attributable to noncontrolling interest Net Income Loss Attributable To Noncontrolling Interest Net loss attributable to Astrotech Corporation Net Income Loss Weighted average common shares outstanding: Earnings Per Share Basic And Diluted Other Disclosures [Abstract] Basic and diluted (in shares) Weighted Average Number Of Share Outstanding Basic And Diluted Basic and diluted net loss per common share: Earnings Per Share Basic And Diluted [Abstract] Net loss attributable to Astrotech Corporation (in dollars per share) Earnings Per Share Basic And Diluted Other comprehensive loss, net of tax: Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Net loss attributable to Astrotech Corporation Available-for-sale securities: Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent [Abstract] Net unrealized (loss) gain Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Reclassification adjustment for realized loss Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Writedown Of Securities Net Of Tax Total comprehensive loss Comprehensive Income Net Of Tax Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Net loss Adjustments to reconcile net loss from operations to net cash used in operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Stock-based compensation Share Based Compensation Amortization Adjustment For Amortization Depreciation Depreciation Net loss on sale of available-for-sale investments Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments Changes in assets and liabilities: Increase Decrease In Operating Capital [Abstract] Accounts receivable Increase Decrease In Accounts Receivable Cost, estimated earnings and billings, net on uncompleted contracts Increase Decrease In Cost In Excess Of Billing On Uncompleted Contract Accounts payable Increase Decrease In Accounts Payable Other assets and liabilities Increase Decrease In Other Operating Capital Net Net cash used in operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Sale of available-for-sale investments Proceeds From Sale Of Available For Sale Securities Maturities of available-for-sale securities Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Purchases of property and equipment Payments To Acquire Property Plant And Equipment Net cash provided by investing activities Net Cash Provided By Used In Investing Activities Cash flows from financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Payments for purchase of treasury stock Payments For Repurchase Of Equity Net cash used in financing activities Net Cash Provided By Used In Financing Activities Net change in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Income taxes paid Income Taxes Paid Organization Consolidation And Presentation Of Financial Statements [Abstract] General Information Business Description And Basis Of Presentation [Text Block] Going Concern Substantial Doubt About Going Concern [Text Block] Investments Debt And Equity Securities [Abstract] Investments Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block] Inventory Disclosure [Abstract] Inventory Inventory Disclosure [Text Block] Noncontrolling Interest [Abstract] Noncontrolling Interest Minority Interest Disclosure [Text Block] Earnings Per Share [Abstract] Net Loss per Share Earnings Per Share [Text Block] The entire disclosure for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction. Revenue Recognition [Abstract] Revenue Recognition Revenue Recognition [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurement Fair Value Disclosures [Text Block] Equity [Abstract] Other Comprehensive Loss Comprehensive Income Note [Text Block] Risks And Uncertainties [Abstract] Business Risk and Credit Risk Concentration Involving Cash Concentration Risk Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Common Stock Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Our Business Units Segment Reporting Policy Policy [Text Block] Revenue Recognition Revenue Recognition Policy [Text Block] Income Taxes Income Tax Policy [Text Block] Schedule of available-for-sale securities Available For Sale Securities [Text Block] Schedule of held-to-maturity securities Held To Maturity Securities [Text Block] Schedule of inventory Schedule Of Inventory Current Table [Text Block] Schedule of noncontrolling interest Redeemable Noncontrolling Interest Table [Text Block] Schedule of changes in stockholders equity Schedule Of Stockholders Equity Table [Text Block] Schedule of earnings per share basic and diluted Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Schedule of fair value of financial instruments Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Table [Text Block] Schedule of accumulated other comprehensive loss Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block] Schedule of concentrations of sales and accounts receivable Schedules Of Concentration Of Risk By Risk Factor [Text Block] Schedule of stock option activity Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Schedule of stock options by exercise price Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Text Block] Schedule of restricted stock activity Schedule Of Unvested Restricted Stock Units Roll Forward Table [Text Block] Schedule of segment reporting information by segment Schedule Of Segment Reporting Information By Segment [Text Block] Reverse stock split ratio Stockholders Equity Note Stock Split Conversion Ratio1 Working Capital (Deficit) Surplus Working capital Working Capital Deficit Surplus Net loss Net cash used in operating activities Investment [Table] Investment [Table] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] Mutual Funds - Corporate & Government Debt Mutual Fund [Member] Fixed Income Bonds Fixed Income Investments [Member] Time Deposits Bank Time Deposits [Member] Investment [Line Items] Investment [Line Items] Available-for-sale securities Available For Sale Securities [Abstract] Adjusted Cost Available For Sale Securities Amortized Cost Unrealized Gain Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax Unrealized Loss Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax Fair Value Available For Sale Securities Available for sale securities maturities 91 To 360 days net carrying value. Schedule Of Held To Maturity Securities [Table] Schedule Of Held To Maturity Securities [Table] Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] Schedule Of Held To Maturity Securities [Line Items] Available-for-sale securities, short-term investments Available-for-sale securities maturities from 91-360 days, short-term investments Available For Sale Securities Maturities91 To360 Days Net Carrying Value Available-for-sale securities maturities less than 1 year, short-term investments Available For Sale Securities Debt Maturities Within One Year Amortized Cost Available for sale securities maturities over 360 days net carrying value. Available for sale securities debt maturities after one year through three years carrying value. Available-for-sale securities maturities over 360 days, long-term investments Available For Sale Securities Maturities Over360 Days Net Carrying Value Available-for-sale securities maturities from 1-3 years, long-term investments Available For Sale Securities Debt Maturities After One Year Through Three Years Carrying Value Available-for-sale securities, long-term investments Inventory valuation reserves Inventory Valuation Reserves Raw materials Inventory Raw Materials Net Of Reserves Work in process Inventory Work In Process Net Of Reserves Total inventory Minority Interest [Table] Minority Interest [Table] Legal Entity Legal Entity [Axis] Entity Entity [Domain] Astral Images, Inc. Astral Images, Inc Astral Images Inc [Member] Noncontrolling Interest [Line Items] Minority Interest [Line Items] Ownership percentage Minority Interest Ownership Percentage By Parent Consolidated Entities Consolidated Entities [Axis] Consolidated Entities Consolidated Entities [Domain] ASTC Contribution Parent Company [Member] Minority Owner Subsidiaries [Member] Contributions made Noncontrolling Interest Increase From Subsidiary Equity Issuance Contributions made Minority Interest Decrease From Distributions To Noncontrolling Interest Holders Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase Decrease In Stockholders Equity Roll Forward Balance, beginning of period Stock based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Share repurchases Treasury Stock Value Acquired Cost Method Net change on available-for-sale investments Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Balance, end of period Amounts attributable to parent basic and diluted.