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Stock Benefit Plans -Schedule of Stock Option Award Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Beginning balance, Shares 4,307,248 5,878,441  
Granted, Shares 1,767,018 297,586  
Exercised, Shares   (4,531)  
Forfeited, Shares (137,925) (143,863)  
Expired, Shares (1,714,762) (1,720,385)  
Ending balance, Shares 4,221,579 4,307,248 5,878,441
Vested and expected-to-vest at June 30, 2017, Shares 4,019,351    
Vested and exercisable at June 30, 2017, Shares 2,482,868    
Beginning balance, Weighted Average Exercise Price $ 9.78 $ 10.07  
Granted, Weighted Average Exercise Price 3.62 5.41  
Exercised, Weighted Average Exercise Price   5.79  
Forfeited, Weighted Average Exercise Price 4.31 7.84  
Expired, Weighted Average Exercise Price 12.15 10.18  
Ending balance, Weighted Average Exercise Price 6.50 $ 9.78 $ 10.07
Vested and expected-to-vest at June 30, 2017, Weighted Average Exercise Price 6.65    
Vested and exercisable at June 30, 2017, Weighted Average Exercise Price $ 8.40    
Weighted Average Remaining Contractual Life (In years) 4 years 2 months 1 day 2 years 8 months 2 days 2 years 10 months 17 days
Vested and expected-to-vest at June 30, 2017, Weighted Average Remaining Contractual Life (In years) 4 years 26 days    
Vested and exercisable at June 30, 2017, Weighted Average Remaining Contractual Life (In years) 2 years 10 months 6 days    
Aggregate Intrinsic Value $ 996 $ 15 $ 951
Vested and expected-to-vest at June 30, 2017, Aggregate Intrinsic Value 891    
Vested and exercisable at June 30, 2017, Aggregate Intrinsic Value $ 118