Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Income continuing operations		$ 1,335	$ 4,277	$ 5,023	$ 9,634
Income from discontinued operations, after income taxes		0	0	0	3,230
Net income		$ 1,335	$ 4,277	$ 5,023	$ 12,864
Denominator:
Denominator for basic net income per common share — weighted average shares outstanding		26,522,000	25,904,000	26,390,000	25,684,000
Effect of dilutive securities:
Stock options and restricted stock units		434,000	396,000	720,000	472,000
Denominator for diluted net income per common share — adjusted weighted average shares		26,956,000	26,300,000	27,110,000	26,156,000
Basic net income per common share:
Continuing operations, basic (USD per share)		$ 0.05	$ 0.17	$ 0.19	$ 0.38
Discontinued operations, basic (USD per share)		0.00	0.00	0.00	0.13
Net income, basic (USD per share)	[1],[2]	0.05	0.17	0.19	0.50
Diluted net income per common share
Continuing operations, diluted (USD per share)		0.05	0.16	0.19	0.37
Discontinued operations, diluted (USD per share)		0.00	0.00	0.00	0.12
Net income, diluted (USD per share)		$ 0.05	$ 0.16	$ 0.19	$ 0.49
Potentially dilutive securities excluded from computation of earnings per share		1,910,081	1,829,631	1,169,422	1,806,131

[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.