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Stock Incentive Plan - Narratives (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
May 03, 2017
shares
Aug. 20, 2015
$ / shares
shares
Jul. 14, 2015
shares
Sep. 30, 2017
USD ($)
director
shares
Sep. 30, 2016
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Non-vested options outstanding       2,029,901  
Unrecognized compensation costs related to non-vested share-based compensation | $       $ 2,500  
Weighted-average period recognized       1 year 6 months 11 days  
Stock vesting period       4 years  
Performance Units available for grant       9,340,512  
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock units granted       35,366  
Unrecognized compensation costs related to non-vested share-based compensation | $       $ 900  
Weighted-average period recognized       9 months 15 days  
Stock-based compensation | $       $ 300 $ 300
President and Chief Executive Officer | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock units granted       35,366  
Executive Officers [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock units granted   214,205      
Unrecognized compensation costs related to non-vested share-based compensation | $       $ 200  
Restricted stock units, closing price | $ / shares   $ 1.76      
Executive Officers [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense related stock options | $       $ 32 200
Stock vesting period   4 years      
Executive Officers [Member] | Performance Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted-average period recognized       1 year 5 months 19 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 | $       $ 600 $ 800
Board Members [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of members of Board of Directors | director       1  
Goldenberg Agreement | Employment Agreement | Restricted Units Vesting Based on Certain Market Conditions          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock units granted 1,500,000        
Stock vesting period     3 years    
Performance Units available for grant     1,500,000