Stock-based Compensation, Equity Grants, and Warrants - Stock Option Activity (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Number of Shares
Outstanding at beginning of period (in shares)	1,613	1,363
Granted (in shares)	830	250
Cancelled (in shares)	(63)
Outstanding at end of period (in shares)	2,380	1,613	1,363
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 1.15	$ 1.19
Granted (in dollars per share)	$ 1.52	$ 0.95
Cancelled (in dollars per share)	$ 1.40
Outstanding at end of period (in dollars per share)	$ 1.40	$ 1.15	$ 1.19
Share Based Compensation Arrangement by Share Based Payment, Award, Options Weighted Average Remaining Contractual Term [Abstract]
Outstanding	7 years 9 months 18 days	7 years 10 months 24 days	8 years 7 months 6 days
Share Based Compensation Arrangement by Share Based Payment, Award, Options Aggregate Intrinsic Value [Abstract]
Outstanding at the beginning of period (in dollars)	$ 388	$ 140
Outstanding at the end of period (in dollars)	$ 1,589	$ 388	$ 140