CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Accumulated Other Comprehensive Income	Accumulated Deficit	Treasury Stock
Beginning balance (in shares) at Sep. 30, 2021		36,984,000
Shares of common stock
Stock-based compensation (in shares)		601,000
Stock option exercises (in shares)		6,000
Sale of common stock (in shares)		0
Ending balance (in shares) at Sep. 30, 2022	37,591,000	37,591,000
Balance, beginning of period at Sep. 30, 2021		$ 782,266	$ 0	$ (597,766)	$ (47,721)
Shares of common stock
Stock-based compensation		5,374
Stock option exercises		29
Tax withholding paid on behalf of employees for stock-based awards		(322)
Sale of common stock, net of offering costs		0
Pension adjustment			441
Net loss	$ (24,333)			(24,333)
Balance, end of period at Sep. 30, 2022	$ 117,968	$ 787,347	441	(622,099)	(47,721)
Shares of common stock
Stock-based compensation (in shares)		1,463,000
Stock option exercises (in shares)	0	0
Sale of common stock (in shares)		38,054,000
Ending balance (in shares) at Sep. 30, 2023	77,108,000	77,108,000
Shares of common stock
Stock-based compensation		$ 6,888
Stock option exercises		0
Tax withholding paid on behalf of employees for stock-based awards		(164)
Sale of common stock, net of offering costs		31,048
Pension adjustment			(91)
Net loss	$ (75,359)			(75,359)
Balance, end of period at Sep. 30, 2023	$ 80,290	$ 825,119	$ 350	$ (697,458)	$ (47,721)