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Stockholders' Equity - Share Repurchase Program (Details) - Common stock - shares
9 Months Ended
Mar. 31, 2020
Apr. 30, 2020
Mar. 31, 2018
Share Repurchase Program      
Number of shares repurchased 562,707    
Maximum      
Share Repurchase Program      
Number of repurchased shares authorized   1,000,000 1,000,000