Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Numerator:
Net income (loss)	$ 2,775	$ (2,695)
Denominator:
Weighted average basic shares (in shares)	11,614	11,551
Dilutive effect of restricted stock units (in shares)	51	0
Weighted average diluted shares (in shares)	11,665	11,551
Income (loss) per share:
Basic (in dollars per share)	$ 0.24	$ (0.23)
Diluted (in dollars per share)	$ 0.24	$ (0.23)