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Stock-based Compensation - Stock Options - Performance-based Awards (Details) - Stock options - performance based - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Number of awards    
Outstanding balance, beginning (in shares) 776,299  
Granted (in shares) 0  
Forfeited (in shares) 0  
Vested (in shares) 0  
Outstanding balance, ending (in shares) 776,299  
Weighted average grant-date fair value per share    
Outstanding balance, beginning (in dollars per share) $ 3.08 $ 3.08
Granted (in dollars per share) 0  
Forfeited (in dollars per share) 0  
Vested (in dollars per share) 0  
Outstanding balance, ending (in dollars per share) $ 3.08  
Unrecognized compensation cost $ 1.4  
Weighted-average period (in years) 2 years 4 months 24 days