Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income	$ 5,899	$ 2,847	$ 11,678	$ 4,034
Denominator:
Denominator for basic net income per common share — weighted average shares outstanding	35,791,000	35,015,000	35,698,000	34,785,000
Effect of dilutive securities:
Stock options and restricted stock units	939,000	593,000	1,123,000	925,000
Denominator for diluted net income per common share — adjusted weighted average shares	36,730,000	35,608,000	36,821,000	35,710,000
Basic net income per common share:
Net income, basic (USD per share)	$ 0.16	$ 0.08	$ 0.33	$ 0.12
Diluted net income per common share
Net income , diluted (USD per share)	$ 0.16	$ 0.08	$ 0.32	$ 0.11
Potentially dilutive securities excluded from computation of earnings per share	609,017	1,129,393	416,307	735,611