Equity (Schedule of Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator:
(Loss) income from continuing operations	$ (8,414)	$ 2,436	$ (11,567)	$ 6,057
Loss from discontinued operations	0	(11)	0	(27)
Undistributed earnings allocated to common shareholders for basic and diluted net income per share	$ (8,414)	$ 2,425	$ (11,567)	$ 6,030
Denominator:
Denominator for basic net income per share - weighted average shares outstanding (in shares)	27,387	26,833	27,204	26,577
Dilutive options outstanding, unvested stock units and ESPP (in shares)	0	983	0	971
Denominator for diluted net income per share - adjusted weighted average shares outstanding (in shares)	27,387	27,816	27,204	27,548
Net (loss) income per basic share:
Continuing operations (in usd per share)	$ (0.31)	$ 0.09	$ (0.43)	$ 0.23
Discontinued operations (in usd per share)	0.00	0.00	0.00	0.00
Net income per basic share (in usd per share)	(0.31)	0.09	(0.43)	0.23
Net (loss) income per diluted share:
Continuing operations (in usd per share)	(0.31)	0.09	(0.43)	0.22
Discontinued operations (in usd per share)	0.00	0.00	0.00	0.00
Net income per diluted share (in usd per share)	$ (0.31)	$ 0.09	$ (0.43)	$ 0.22
Weighted average antidilutive options, unvested restricted stock units and awards, warrants and ESPP shares excluded from the computation (in shares)	825	370	725	400
Average market price of common stock (in dollars per share)	$ 5.06	$ 10.00	$ 6.20	$ 8.66