CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 362	$ 341
Common stock, par value (in dollars per share)	$ 0.50	$ 0.50
Common Stock, Shares Authorized	20,000,000	20,000,000
Common Stock, Shares, Issued	8,445,060	8,445,060
Treasury stock, shares (in shares)	167,900	167,900