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Equity (Schedule of Stock Options Activity) (Details)
9 Months Ended
Jun. 30, 2019
USD ($)
$ / shares
shares
Jun. 30, 2018
USD ($)
shares
Number of Shares    
Outstanding, beginning of period (in shares) | shares 69,980  
Granted (in shares) | shares 0 0
Exercised (in shares) | shares (208)  
Forfeited (in shares) | shares (1,614)  
Expired (in shares) | shares (2,242)  
Outstanding, end of period (in shares) | shares 65,916  
Exercisable (in shares) | shares 50,318  
Vested and expected to vest (in shares) | shares 65,916  
Weighted Average Exercise Price    
Outstanding, beginning of period (in usd per share) | $ / shares $ 4.74  
Granted (in usd per share) | $ / shares 0.00  
Exercised (in usd per share) | $ / shares 3.97  
Forfeited (in usd per share) | $ / shares 3.92  
Expired (in usd per share) | $ / shares 4.62  
Outstanding, ending of period (in usd per share) | $ / shares 4.77  
Exercisable (in usd per share) | $ / shares 4.75  
Vested and expected to vest (in usd per share) | $ / shares $ 4.77  
Weighted Average Remaining Contractual Life (in years)    
Weighted average remaining contractual life, outstanding (in years) 4 years 2 months 23 days  
Weighted average remaining contractual life, exercisable (in years) 3 years 6 months 29 days  
Weighted average remaining contractual term, vested and expected to vest (in years) 4 years 2 months 23 days  
Aggregate Intrinsic Value    
Intrinsic value of options exercised | $ $ 0.00 $ 14,000
Intrinsic value of shared outstanding | $ 1,000  
Intrinsic value of shares exercisable | $ 1,000  
Intrinsic value of shares vested and expected to vest | $ 1,000  
Employee Stock Option    
Aggregate Intrinsic Value    
Unrecognized stock-based compensation expense | $ $ 27,000  
Expected weighted average recognition period 1 year 2 months 19 days