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Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Numerator [Abstract]
Net income (loss)	$ 1,316	$ 979	$ (1,535)	$ 1,303
Denominator [Abstract]
Denominator for basic net income (loss) per share - weighted-average outstanding shares (shares)	11,889	11,249	11,863	11,225
Effect of dilutive securities:
Stock options and restricted stock (shares)	997	1,496	0	1,488
Denominator for diluted net income (loss) per share - weighted-average outstanding shares (shares)	12,886	12,745	11,863	12,713
Net income (loss) per share - basic (dollars per share)	$ 0.11	$ 0.09	$ (0.13)	$ 0.12
Net income (loss) per share - diluted (in dollars per share)	$ 0.10	$ 0.08	$ (0.13)	$ 0.10

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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