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Stock-based Compensation, Equity Grants, and Warrants - Additional Information (Details) (USD $)
In Thousands, except Share data in Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expiration term of options 10 years 10 years
Risk free interest rate (percent) 2.55% 0.69%
Expected volatility rate (percent) 65.80% 70.20%
Fair value per option (in dollars per share) $ 0.76 $ 0.22
Weighted average exercise price of vested and exercisable shares (dollars per share) $ 1.41 $ 1.61
Aggregate intrinsic value of vested and exercisable shares $ 570 $ 49
Weighted average contractual term 8 years 7 years 10 months 24 days
Compensation expense recognition period 2 years 9 months 18 days  
Compensation expense weighted average life 1 year 2 months 12 days  
2006 Long Term Incentive Plan | Employee Stock Option
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares available for grant 0.9  
Expiration term of options 10 years