CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Statement of Financial Position [Abstract]
Accounts receivable, allowance for credit loss, current	$ 398	$ 341
Common stock, par value (in dollars per share)	$ 0.50	$ 0.50
Common stock, authorized shares (in shares)	20,000,000	20,000,000
Common stock, issued shares (in shares)	9,031,606	8,445,060
Treasury stock, shares (in shares)	167,900	167,900