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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net income	$ 803	$ 1,614	$ 3,758	$ 79
Denominator:
Denominator for basic net income (loss) per share - weighted-average outstanding shares (shares)	12,036	11,899	12,011	11,875
Effect of dilutive securities:
Stock options and restricted stock (shares)	1,041	985	1,037	997
Denominator for diluted net income (loss) per share - weighted-average outstanding shares (shares)	13,077	12,884	13,048	12,872
Net income per share, basic (in dollars per share)	$ 0.07	$ 0.14	$ 0.31	$ 0.01
Net income per share - diluted (in dollars per share)	$ 0.06	$ 0.13	$ 0.29	$ 0.01

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