Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Restricted Stock Units and Performance Restricted Stock Units - Activity (Details)

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Stock-based Compensation - Restricted Stock Units and Performance Restricted Stock Units - Activity (Details) - $ / shares
3 Months Ended 6 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Restricted Stock Units        
Shares        
Nonvested, balance at the beginning of the period (in shares)     330,830  
Granted (in shares)     210,748  
Vested and issued (in shares)     (74,894)  
Forfeited (in shares)     (13,187)  
Nonvested, balance at the end of the period (in shares) 453,497   453,497  
Awards expected to vest (in shares) 453,497   453,497  
Weighted Average Grant-Date Fair Value        
Nonvested restricted stock units outstanding at the beginning of the period (in dollars per share)     $ 6.28  
Granted (in dollars per share) $ 4.27 $ 6.80 4.27 $ 8.20
Vested and issued (in dollars per share)     6.69  
Forfeited (in dollars per share)     5.21  
Nonvested restricted stock units outstanding at the end of the period (in dollars per share) 5.31   5.31  
Awards expected to vest (in dollars per share) $ 5.31   $ 5.31  
Performance Shares        
Weighted Average Grant-Date Fair Value        
Granted (in dollars per share)       $ 8.90
Performance Shares | Three-year performance measurement period        
Shares        
Granted (in shares)     0 30,139