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Stock-Based Compensation - Summary of Stock Option Plans (Detail) - Stock Options - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2015
Number of Shares        
Outstanding at beginning of period 4,000 51,000    
Granted 0 0 0 0
Exercised   (47,000)    
Cancelled   0    
Outstanding at end of period 4,000 4,000 51,000  
Vested and expected to vest at end of period 4,000      
Exercisable at end of period 4,000      
Weighted Average Exercise Price (in dollars per share)        
Outstanding at beginning of period $ 5.52 $ 13.53    
Granted   0    
Exercised   14.12    
Cancelled   0    
Outstanding at end of period 5.52 $ 5.52 $ 13.53  
Vested and expected to vest at end of period 5.52      
Exercisable at end of period $ 5.52      
Weighted Average Remaining Contractual Term (Years)        
Outstanding at end of period 2 years 1 month 17 days 3 years 1 month 17 days 18 days  
Vested and expected to vest at end of period 2 years 1 month 17 days      
Exercisable at end of period 2 years 1 month 17 days      
Aggregate Intrinsic Value        
Outstanding at end of period $ 227    
Vested and expected to vest at end of period 227      
Exercisable at end of period $ 227