Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income/(Loss)
Balance (in shares) at Sep. 30, 2021		12,498,000
Balance Treasury Stock (in shares) at Sep. 30, 2021					(806,000)
Balance at Sep. 30, 2021	$ 301,223	$ 125	$ 63,948	$ 282,505	$ (24,999)	$ (20,356)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,846)			(2,846)
Foreign currency translation adjustments	54					54
Stock-based compensation (in shares)		72,000
Stock-based compensation	1,008	$ 1	1,007
Shares withheld in lieu of employee tax withholding	(660)		(660)
Dividends	(3,200)		69	(3,269)
Gain on cash flow commodity hedge	0
Balance (in shares) at Dec. 31, 2021		12,570,000
Balance Treasury Stock (in shares) at Dec. 31, 2021					(806,000)
Balance at Dec. 31, 2021	$ 295,579	$ 126	64,364	276,390	$ 24,999	(20,302)
Balance (in shares) at Sep. 30, 2022		12,588,000
Balance Treasury Stock (in shares) at Sep. 30, 2022	(806,018)				(806,000)
Balance at Sep. 30, 2022	$ 297,206	$ 126	67,439	283,638	$ (24,999)	(28,998)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	1,162			1,162
Foreign currency translation adjustments	2,178					2,178
Stock-based compensation (in shares)		53,000
Stock-based compensation	1,307	$ 0	1,307
Shares withheld in lieu of employee tax withholding	(423)		(423)
Dividends	(3,176)		131	(3,307)
Gain on cash flow commodity hedge	$ 218					218
Balance (in shares) at Dec. 31, 2022		12,641,000
Balance Treasury Stock (in shares) at Dec. 31, 2022	(806,018)				(806,000)
Balance at Dec. 31, 2022	$ 298,472	$ 126	$ 68,454	$ 281,493	$ (24,999)	$ (26,602)