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Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 29, 2020 | Dec. 07, 2018 | Dec. 07, 2017 | Jun. 26, 2014 | Jun. 30, 2011
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Aggregate intrinsic value of options exercisable | $ 0 |  |  |  |  |  |
Aggregate intrinsic value of options | 0 |  |  |  |  |  |
Unrecognized compensation cost related to stock option and restricted awards | 13 |  |  |  |  |  |
Employee Stock Option |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation expense recognized | $ 147 | $ 171 |  |  |  |  |
Unrecognized compensation cost over a weighted-average period | 2 years 3 months 18 days |  |  |  |  |  |
Restricted Stock |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation expense recognized | $ 202 | $ 135 |  |  |  |  |
Unrecognized compensation cost over a weighted-average period | 1 year 6 months |  |  |  |  |  |
Unrecognized compensation cost recognized | $ 295 |  |  |  |  |  |
Astrotech - The 2011 Stock Incentive Plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Common stock shares available for future issuance (in shares) |  |  | 1,500,000 | 537,197 | 225,000 | 400,000 | 350,000
Common stock shares available for grant (in shares) | 2,122,523 |  |  |  |  |  |

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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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