Earnings Per Share - Reconciliation of Components of Basic and Diluted EPS Calculations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income		$ 3,204	$ 1,965	$ 460	$ 2,962
Denominator:
Weighted-average shares used to compute basic EPS		14,028	13,979	14,018	14,118
Weighted-average shares used to compute diluted EPS		14,157	14,144	14,142	14,318
Net income per basic share		$ 0.23	$ 0.14	$ 0.03	$ 0.21
Net income per diluted share		$ 0.23	$ 0.14	$ 0.03	$ 0.21
Stock Options
Denominator:
Dilutive potential common shares	[1]	128	165	124	200
RSU
Denominator:
Dilutive potential common shares	[1]	1

[1] The number of common stock equivalents is calculated using the treasury method and the average market price during the period.