Stock-based Compensation, Equity Grants, and Warrants - Stock Option Activity (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Sep. 30, 2014	Mar. 31, 2015	Mar. 31, 2014
Number of Shares
Outstanding at the beginning of the period (in shares)		2,380	2,155
Granted (in shares)		0
Cancelled (in shares)		(44)
Outstanding at the end of the period (in shares)	2,380	2,336	2,155
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)		$ 1.40
Granted (in dollars per share)		$ 0.00
Cancelled (in dollars per share)		$ 1.40
Outstanding at the end of the period (in dollars per share)	$ 1.40	$ 1.40
Weighted Average Remaining Contractual Term
Outstanding at the beginning of the period	7 years 9 months 22 days	7 years 3 months 15 days
Outstanding at the end of the period	7 years 9 months 22 days	7 years 3 months 15 days
Aggregate Intrinsic Value
Outstanding at the beginning of the period (in dollars)		$ 1,589
Outstanding at the end of the period (in dollars)	$ 1,589	$ 1,587