Equity (Schedule of Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Loss from continuing operations	$ (162)	$ (956)	$ (296)	$ (4,086)
Income from discontinued operations	4,144	4,008	5,265	63,266
Net income	$ 3,982	$ 3,052	$ 4,969	$ 59,180
Denominator:
Denominator for basic net (loss) income per share - weighted average shares outstanding (in shares)	25,942	32,077	25,818	31,640
Net (loss) income per basic share:
Net (loss) income per basic share, continuing operations (in usd per share)	$ (0.01)	$ (0.03)	$ (0.01)	$ (0.13)
Net (loss) income per basic share, discontinued operations (in usd per share)	0.16	0.13	0.20	2.00
Net income per basic share (in usd per share)	$ 0.15	$ 0.10	$ 0.19	$ 1.87
Weighted average antidilutive options, unvested restricted stock units and awards, warrants and ESPP shares excluded from the computation (in shares)	721	2,214	794	2,434
Average market price of common stock (in dollars per share)	$ 5.44	$ 5.34	$ 6.19	$ 5.32