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Shareholders' Equity (Share-based Compensation Activity) (Details) - $ / shares
shares in Thousands
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Balance as of September 30, 2018 278    
Awarded, Number of Shares 0    
Adjustment, Number of Shares 23    
Vested, Number of Shares (108)    
Forfeited, Number of Shares (60)    
Balance as of September 30, 2019 133 278  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Weighted Average Grant Date Fair Value per Share at September 30, 2018 $ 2.69    
Awarded, Weighted Average Grant Date Fair Value per Share 0.00    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Weighted Average Exercise Price 0.00    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value 3.11    
Forfeited, Weighted Average Grant Date Fair Value per Share 2.75    
Weighted Average Grant Date Fair Value per Share at September 30, 2019 $ 2.40 $ 2.69  
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Awarded, Number of Shares 0 0 0
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Balance as of September 30, 2018 572    
Awarded, Number of Shares 0    
Vested, Number of Shares (228)    
Forfeited, Number of Shares (108)    
Balance as of September 30, 2019 236 572  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Weighted Average Grant Date Fair Value per Share at September 30, 2018 $ 2.95    
Awarded, Weighted Average Grant Date Fair Value per Share 0.00 $ 2.90 $ 3.41
Vested, Weighted Average Grant Date Fair Value per Share 3.17    
Forfeited, Weighted Average Grant Date Fair Value per Share 2.96    
Weighted Average Grant Date Fair Value per Share at September 30, 2019 $ 2.74 $ 2.95