Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income	$ 3,442	$ 4,864	$ 7,178	$ 7,804	$ 2,883	$ 2,880	$ 2,567	$ 1,814	$ 23,288	$ 10,145
Denominator:
Denominator for basic net income per share - weighted-average outstanding shares (in shares)									12,830	12,549
Effect of dilutive securities:
Stock options and restricted stock (in shares)									1,349	1,048
Denominator for diluted net income per share - weighted-average outstanding shares (in shares)									14,179	13,597
Net income per share - basic (in dollars per share)	$ 0.27	$ 0.38	$ 0.56	$ 0.61	$ 0.23	$ 0.23	$ 0.20	$ 0.15	$ 1.82	$ 0.81
Net income per share - diluted (in dollars per share)	$ 0.24	$ 0.34	$ 0.50	$ 0.55	$ 0.21	$ 0.21	$ 0.19	$ 0.13	$ 1.64	$ 0.75