Equity (Schedule of Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Numerator:
(Loss) income from continuing operations	$ 1,350	$ 464	$ (956)	$ (3,130)	$ 16,976	$ (4,349)	$ (4,722)	$ (3,823)	$ (2,272)	$ 4,082	$ (5,554)
Income from discontinued operations	130	1,976	4,008	59,258	(1,488)	1,199	(710)	1,769	65,372	770	10,542
Net income	$ 1,480	$ 2,440	$ 3,052	$ 56,128	$ 15,488	$ (3,150)	$ (5,432)	$ (2,054)	63,100	4,852	4,988
Undistributed earnings-allocated to participating securities									0	(6)	(18)
Allocation of undistributed earnings - continuing operations									(2,272)	4,076	(5,572)
Undistributed earnings-allocated to participating securities									0	0	(8)
Allocation of undistributed earnings - discontinued operations									65,372	770	10,534
Undistributed earnings allocated to common shareholders for basic net income per share									63,100	4,846	4,962
Undistributed earnings allocated to common shareholders for diluted net income per share									$ 63,100	$ 4,846	$ 4,962
Denominator:
Denominator for basic net (loss) income per share - weighted average shares outstanding (in shares)	25,615	31,203	32,077	31,217	30,752	30,656	30,392	29,938	30,012	30,453	26,531
Dilutive options outstanding, unvested stock units and ESPP (in shares)									0	324	0
Denominator for diluted net (loss) income per share - adjusted weighted average shares outstanding (in shares)	25,896	31,432	32,077	31,217	30,992	30,656	30,392	29,938	30,012	30,777	26,531
Net income (loss) per basic and diluted shares:
Net (loss) income per basic share, continuing operations (in usd per share)	$ 0.05	$ 0.02	$ (0.03)	$ (0.10)	$ 0.55	$ (0.14)	$ (0.16)	$ (0.13)	$ (0.08)	$ 0.13	$ (0.21)
Net (loss) income per basic share, discontinued operations (in usd per share)									2.18	0.03	0.40
Net income per basic share (in usd per share)									2.10	0.16	0.19
Net (loss) income per diluted share, continuing operations (in usd per share)	0.05	0.02	(0.03)	(0.10)	0.55	(0.14)	(0.16)	(0.13)	(0.08)	0.13	(0.21)
Net (loss) income per diluted share, discontinued operations (in usd per share)									2.18	0.03	0.40
Net income per diluted share (in usd per share)	$ 0.06	$ 0.08	$ 0.10	$ 1.80	$ 0.50	$ (0.10)	$ (0.18)	$ (0.07)	$ 2.10	$ 0.16	$ 0.19
Weighted average antidilutive options, unvested restricted stock units and awards, warrants and ESPP shares excluded from the computation (in shares)									1,391	1,936	2,672
Average market price of common stock (in dollars per share)									$ 5.81	$ 4.69	$ 4.64