Equity (Schedule of Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Numerator:
(Loss) income from continuing operations	$ (82)	$ 1,766
Loss from discontinued operations	0	(9)
Undistributed earnings allocated to common shareholders for basic and diluted net income per share	$ (82)	$ 1,757
Denominator:
Denominator for basic net income per share - weighted average shares outstanding (in shares)	27,032	26,279
Dilutive options outstanding, unvested stock units and ESPP (in shares)	0	760
Denominator for diluted net income per share - adjusted weighted average shares outstanding (in shares)	27,032	27,039
Net (loss) income per basic share:
Continuing operations (in usd per share)	$ 0.00	$ 0.07
Discontinued operations (in usd per share)	0.00	0.00
Net income per basic share (in usd per share)	0.00	0.07
Net (loss) income per diluted share:
Continuing operations (in usd per share)	0.00	0.07
Discontinued operations (in usd per share)	0.00	0.00
Net income per diluted share (in usd per share)	$ 0.00	$ 0.07
Weighted average antidilutive options, unvested restricted stock units and awards, warrants and ESPP shares excluded from the computation (in shares)	911	529
Average market price of common stock (in dollars per share)	$ 7.50	$ 6.88