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Net Income Per Common Share - Additional Information (Details) - shares
3 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Stock Options        
Antidilutive Securities Excluded From Computation Of Earnings Per Share        
Antidilutive securities excluded from computation of earnings per share, share amount 322,088 663,821 283,600 615,649