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Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Numerator [Abstract]
Net income (loss)	$ (2,851)	$ 324
Denominator [Abstract]
Denominator for basic net income (loss) per share - weighted-average outstanding shares (shares)	11,837	11,201
Effect of dilutive securities:
Stock options and restricted stock (shares)	0	1,489
Denominator for diluted net income (loss) per share - weighted-average outstanding shares (shares)	11,837	12,690
Net income (loss) per share - basic (dollars per share)	$ (0.24)	$ 0.03
Net income (loss) per share - diluted (in dollars per share)	$ (0.24)	$ 0.03

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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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