Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Income continuing operations		$ 2,226	$ 1,662	$ 5,357	$ 2,680
(Loss) income from discontinued operations, after income taxes		(89)	(216)	3,230	(1,573)
Net income		$ 2,137	$ 1,446	$ 8,587	$ 1,107
Denominator:
Denominator for basic net income (loss) per common share — weighted average shares outstanding		25,820,000	24,492,000	25,574,000	24,319,000
Effect of dilutive securities:
Stock options and restricted stock units		178,000	781,000	542,000	497,000
Denominator for diluted net income (loss) per common share — adjusted weighted average shares		25,998,000	25,273,000	26,116,000	24,816,000
Basic net income (loss) per common share:
Continuing operations, basic (USD per share)		$ 0.09	$ 0.07	$ 0.21	$ 0.11
Discontinued operations, basic (USD per share)		0.00	(0.01)	0.13	(0.06)
Net income, basic (1) (USD per share)	[1],[2]	0.08	0.06	0.34	0.05
Diluted net income (loss) per common share
Continuing operations, diluted (USD per share)		0.09	0.07	0.21	0.11
Discontinued operations, diluted (USD per share)		0.00	(0.01)	0.12	(0.06)
Net income, diluted (1) (USD per share)	[1],[2]	$ 0.08	$ 0.06	$ 0.33	$ 0.04
Potentially dilutive securities excluded from computation of earnings per share		2,735,177	2,366,812	1,495,104	3,496,463

[1] Earnings per share presented are calculated by line item and may not add due to the use of rounded amounts.

[2] Earnings per share presented are calculated by line item and may not add due to the use of rounded amounts.