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Stock Incentive Plan - Narratives (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Aug. 20, 2015
$ / shares
shares
Mar. 31, 2016
USD ($)
item
shares
Mar. 31, 2015
USD ($)
Mar. 31, 2016
USD ($)
item
shares
Mar. 31, 2015
USD ($)
Jun. 30, 2015
item
shares
Jul. 14, 2015
shares
Jun. 30, 2014
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Non-vested options outstanding   3,541,732   3,541,732        
Unrecognized compensation costs related to non-vested share-based compensation | $       $ 6,200        
Weighted-average period recognized       2 years 3 months 15 days        
Stock vesting period       4 years        
Performance Units available for grant   9,829,484   9,829,484        
Performance Units, awarded       348,384        
Restricted Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock units awarded       272,081        
Unrecognized compensation costs related to non-vested share-based compensation | $       $ 2,600        
Weighted-average period recognized       2 years 3 months        
Stock-based compensation | $       $ 45        
Restricted Units Vesting Based on Certain Market Conditions [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock units awarded       1,500,000        
Performance Units [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock units awarded       136,452        
Unrecognized compensation costs related to non-vested share-based compensation | $       $ 200        
Weighted-average period recognized       2 years        
Stock-based compensation | $   $ 100 $ 300 $ 100 $ 300      
Performance Units available for grant               389,864
Performance Units, awarded           116,959    
Performance milestone achieved | item           2    
President and Chief Executive Officer [Member] | Restricted Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock units awarded       198,864        
Chief Financial Officer [Member] | Restricted Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock units awarded       15,341        
Chairman, Chief Scientific Officer and Chief Patent Officer [Member] | Restricted Units Vesting Based on Certain Market Conditions [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock units awarded       1,500,000        
Executive Officers [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock units awarded 214,205              
Unrecognized compensation costs related to non-vested share-based compensation | $       $ 1,100        
Restricted stock units, closing price | $ / shares $ 1.76              
Restricted stock units   136,453   136,453        
Performance milestone achieved | item   2   2        
Executive Officers [Member] | Restricted Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation expense related stock options | $   $ 200 200 $ 500 600      
Stock vesting period       4 years        
Executive Officers [Member] | Performance Units [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Weighted-average period recognized       2 years 3 months 29 days        
Employees, Executive Officers and Non-Employee Board Members [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation expense related stock options | $   900 600 $ 2,800 2,100      
Board Members [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted stock units awarded       57,876        
Non-Employee Board [Member] | Restricted Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation | $   45 $ 44 $ 136 $ 136      
Goldenberg Agreement [Member] | Employment Agreement [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Agreement date       Jul. 01, 2015        
Goldenberg Agreement [Member] | Employment Agreement [Member] | Restricted Units Vesting Based on Certain Market Conditions [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Performance Units available for grant             1,500,000  
Goldenberg Agreement [Member] | Employment Agreement [Member] | Performance Unit Grant [ Member ]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation expense related stock options | $   $ 300   $ 800