Stockholders' Equity - Stock Options - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Equity [Abstract]
Weighted average grant date fair value of options per share granted	$ 1.14	$ 1.52
Exercised	0
Intrinsic value of options exercised		$ 0.0
Stock-based compensation expense	$ 1.8	0.5
Total unrecognized compensation cost	$ 1.4	$ 2.2
Stock-based compensation period for recognition	9 months 18 days

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of share options (or share units) exercised during the current period.

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