Equity (Schedule of Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Numerator:
Income (loss) from continuing operations	$ 1,737	$ 1,178	$ (162)	$ (134)	$ 1,350	$ 464	$ (956)	$ (3,130)	$ 2,619	$ (2,272)	$ 4,082
Income from discontinued operations	259	123	4,144	1,121	130	1,976	4,008	59,258	5,647	65,372	770
Net income	$ 1,996	$ 1,301	$ 3,982	$ 987	$ 1,480	$ 2,440	$ 3,052	$ 56,128	$ 8,266	$ 63,100	$ 4,852
Denominator:
Denominator for basic net income (loss) per share - weighted average shares outstanding (in shares)	26,177	26,103	25,942	25,697	25,615	31,203	32,077	31,217	25,979	30,012	30,453
Dilutive options outstanding, unvested stock units and ESPP (in shares)									539	0	324
Denominator for diluted net income (loss) per share - adjusted weighted average shares outstanding (in shares)	26,674	26,269	25,942	25,697	25,896	31,432	32,077	31,217	26,518	30,012	30,777
Net (loss) income per basic share:
Net income (loss) per basic share, continuing operations, (in usd per share)	$ 0.07	$ 0.05	$ (0.01)	$ 0.00	$ 0.05	$ 0.02	$ (0.03)	$ (0.10)	$ 0.10	$ (0.08)	$ 0.13
Net (loss) income per basic share, discontinued operations (in usd per share)									0.22	2.18	0.03
Net income per basic share (in usd per share)									0.32	2.10	0.16
Earnings Per Share, Diluted [Abstract]
Net income (loss) per diluted share, continuing operations (in usd per share)	0.06	0.05	(0.01)	0.00	0.05	0.02	(0.03)	(0.10)	0.10	(0.08)	0.13
Net income per diluted share, discontinued operations (in usd per share)									0.21	2.18	0.03
Net income per diluted share (in usd per share)	$ 0.07	$ 0.05	$ 0.15	$ 0.04	$ 0.06	$ 0.08	$ 0.10	$ 1.80	$ 0.31	$ 2.10	$ 0.16
Weighted average antidilutive options, unvested restricted stock units and awards, warrants and ESPP shares excluded from the computation (in shares)									508	1,391	1,936
Average market price of common stock (in dollars per share)									$ 5.88	$ 5.81	$ 4.69