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Net Income Per Share - Schedule of Dilutive Securities (Details) - Contingent restricted stock grants - $ / shares
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Outstanding Potential Dilutive Securities    
Weighted Average Exercise Price (in dollars per share) $ 0.00 $ 0.00
Balance at the end of the period (in shares) 10,156 94,244