Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income (loss)	$ (364)	$ 2,775
Denominator:
Weighted average basic shares (in shares)	11,674	11,614
Dilutive effect of restricted stock units (in shares)	0	51
Weighted average diluted shares (in shares)	11,674	11,665
Earnings per share:
Basic (in dollars per share)	$ (0.03)	$ 0.24
Diluted (in dollars per share)	$ (0.03)	$ 0.24