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Stockholders' Equity - Stock Options (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Stockholders' Equity |  |  |  |
Total unrecognized compensation cost | $ 1.7 |  | $ 1.7 |
Restricted Stock Awards and Stock Options |  |  |  |
Stockholders' Equity |  |  |  |
Stock-based compensation | $ 0.3 | $ 0.2 | $ 0.7 | $ 0.3

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