CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
ASSETS
Allowances for accounts receivable	$ 284	$ 284
LIABILITIES AND STOCKHOLDERS’ EQUITY
Unamortized debt issuance expense	$ 6,142	$ 7,280
Preferred stock, par value (in USD per share)	$ 0.01	$ 0.01
Preferred stock authorized (in shares)	5,000,000	5,000,000
Preferred stock issued (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.001	$ 0.001
Common stock authorized (in shares)	63,000,000	63,000,000
Common stock issued (in shares)	31,339,214	30,880,138
Common stock outstanding (in shares)	31,339,214	30,880,138