Stockholders' Equity - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Options
Beginning balance (in shares)	1,224	1,030
Granted (in shares)	180	194
Forfeited or expired (in shares)	(34)
Ending balance (in shares)	1,370	1,224	1,030
Vested and exercisable balance (in shares)	1,238
Weighted Average Exercise Price Per Share
Beginning balance (in dollars per share)	$ 6.40	$ 6.60
Granted (in dollars per share)	5.50	5.30
Forfeited or expired (in dollars per share)	5.00
Ending balance (in dollars per share)	6.34	6.40	$ 6.60
Vested and exercisable balance (in dollars per share)	6.42
Weighted Average Grant-Date Fair Value Per Share
Beginning balance (in dollars per share)	1.00	0.80
Granted (in dollars per share)	2.14	2.20
Forfeited or expired (in dollars per share)	2.30
Ending balance (in dollars per share)	1.14	$ 1.00	$ 0.80
Vested and exercisable balance (in dollars per share)	$ 1.02
Weighted Average Remaining Contractual Term
Balance	4 years 1 month 13 days	4 years 8 months 9 days	6 years 6 months
Granted	7 years 8 months 23 days	8 years 5 months 10 days
Forfeited or expired	8 years 15 days
Vested and exercisable balance	3 years 9 months 4 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value	$ 0	$ 104	$ 0