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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Numerator [Abstract]
Net income (loss)	$ 1,690	$ (2,851)
Denominator [Abstract]
Denominator for basic net income (loss) per share - weighted-average outstanding shares (shares)	11,963	11,837
Effect of dilutive securities:
Stock options and restricted stock (shares)	1,016	0
Denominator for diluted net income (loss) per share - weighted-average outstanding shares (shares)	12,979	11,837
Net income per share, basic (in dollars per share)	$ 0.14	$ (0.24)
Net income per share - diluted (in dollars per share)	$ 0.13	$ (0.24)

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