Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 267	$ 260
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	44,449,000	43,890,000
Common stock, shares outstanding (in shares)	37,543,000	36,984,000
Treasury stock, shares held (in shares)	6,906,000	6,906,000