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Equity Incentive Plan - Relationship (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Employee and Non Employees Stock Option [Member]    
Equity Transactions    
Intrinsic value of options exercised $ 0.0 $ 0.2
Unrecognized compensation 0.0  
Stock based compensation expense 0.0 0.0
Performance Share Units    
Equity Transactions    
Unrecognized compensation $ 9.4  
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted 2 years 3 months 18 days  
Stock based compensation expense $ 0.9 $ 3.0