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STOCK BASED COMPENSATION - Option activity for company's stock incentive plans (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Mar. 31, 2017
Jun. 30, 2016
Number of Shares    
Beginning balance (in shares) 2,125,307  
Exercised (in shares) (496,800)  
Forfeitures and cancellations (in shares) (1,356)  
Ending balance (in shares) 1,627,151 2,125,307
Number of shares, vested and expected to vest, ending balance (in shares) 1,627,150  
Number of shares, vested and exercisable, ending balance (in shares) 1,626,889  
Weighted Average Exercise Price    
Beginning balance (in usd per share) $ 2.03  
Exercised (in usd per share) 2.81  
Forfeitures and cancellations (in usd per share) 11.72  
Ending balance (in usd per share) 1.78 $ 2.03
Options, weighted average exercise price, vested and expected to vest, ending balance (in usd per share) 1.78  
Options, weighted average exercise price, vested and exercisable, ending balance (in usd per share) $ 1.78  
Options outstanding, weighted average remaining contractual term, ending balance (in years) 1 year 9 months 18 days 2 years 7 months 24 days
Options, remaining contractual term, vested and expected to vest, ending balance (in years) 1 year 9 months 18 days  
Options, weighted average remaining contractual term, vested and exercisable, ending balance (in years) 1 year 9 months 18 days  
Options outstanding, intrinsic value, ending balance $ 78,878 $ 77,850
Options, aggregate intrinsic value, vested and expected to vest, ending balance 78,878  
Options, aggregate intrinsic value, vested and exercisable, ending balance $ 78,869