Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 250	$ 250
Allowance for excess and obsolete inventory	$ 3,647	$ 3,476
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares issued (in shares)	13,189,112	13,189,112
Common stock, shares outstanding (in shares)	12,610,229	12,610,229