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
Jun. 30, 2020
Jun. 30, 2019
Restricted Stock Units    
Shares    
Nonvested, balance at the beginning of the period (in shares) 330,830  
Vested and issued (in shares) (16,126)  
Forfeited (in shares) (4,000)  
Nonvested, balance at the end of the period (in shares) 310,704  
Awards expected to vest (in shares) 310,704  
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)   $ 5.90
Vested and issued (in dollars per share) 8.82  
Forfeited (in dollars per share) 4.44  
Nonvested restricted stock units outstanding at the end of the period (in dollars per share) 6.17  
Awards expected to vest (in dollars per share) $ 6.17  
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)   30,139