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Subsequent Events (Details) - Restricted Stock Units (RSUs) - shares
3 Months Ended
Jul. 30, 2019
May 13, 2019
May 06, 2019
Jun. 30, 2019
Jun. 30, 2018
Subsequent Event [Line Items]          
Granted (in shares)   7,287 89,286 195,200 203,800
Subsequent Event          
Subsequent Event [Line Items]          
Granted (in shares) 4,183        
Director          
Subsequent Event [Line Items]          
Number of common shares into which each RSU may be converted (in shares)       1  
Director | Subsequent Event          
Subsequent Event [Line Items]          
Number of common shares into which each RSU may be converted (in shares) 1