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 income (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)
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, 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 income (loss)	4,998
Foreign currency translation adjustments	(2,501)
Gain (loss) on cash flow commodity hedge	0
Balance (in shares) at Jun. 30, 2022		12,587,000
Balance Treasury Stock (in shares) at Jun. 30, 2022					(806,000)
Balance at Jun. 30, 2022	295,948	$ 126	65,661	278,017	$ (24,999)	(22,857)
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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,217)			(1,217)
Foreign currency translation adjustments	902					902
Stock-based compensation (in shares)		17,000
Stock-based compensation	711		711
Dividends	(3,105)			(3,105)
Balance (in shares) at Mar. 31, 2022		12,587,000
Balance Treasury Stock (in shares) at Mar. 31, 2022					(806,000)
Balance at Mar. 31, 2022	292,870	$ 126	65,075	272,068	$ 24,999	(19,400)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	9,061			9,061
Foreign currency translation adjustments	(3,457)					(3,457)
Stock-based compensation	588		588
Shares withheld in lieu of employee tax withholding	(3)		(3)
Dividends	(3,111)		1	(3,112)
Gain (loss) on cash flow commodity hedge	0
Balance (in shares) at Jun. 30, 2022		12,587,000
Balance Treasury Stock (in shares) at Jun. 30, 2022					(806,000)
Balance at Jun. 30, 2022	$ 295,948	$ 126	65,661	278,017	$ (24,999)	(22,857)
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 income (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		1,307
Shares withheld in lieu of employee tax withholding	(423)		(423)
Dividends	(3,176)		131	(3,307)
Gain (loss) 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					(806,000)
Balance at Dec. 31, 2022	$ 298,472	$ 126	68,454	281,493	$ 24,999	(26,602)
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 income (loss)	28,090
Foreign currency translation adjustments	4,694
Gain (loss) on cash flow commodity hedge	$ 293
Balance (in shares) at Jun. 30, 2023		12,667,000
Balance Treasury Stock (in shares) at Jun. 30, 2023	(806,018)				(806,000)
Balance at Jun. 30, 2023	$ 324,070	$ 126	70,913	302,040	$ (24,999)	(24,010)
Balance (in shares) at Dec. 31, 2022		12,641,000
Balance Treasury Stock (in shares) at Dec. 31, 2022					(806,000)
Balance at Dec. 31, 2022	298,472	$ 126	68,454	281,493	$ 24,999	(26,602)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	8,473			8,473
Foreign currency translation adjustments	427					427
Stock-based compensation (in shares)		26,000
Stock-based compensation	1,650		1,650
Shares withheld in lieu of employee tax withholding	(159)		(159)
Dividends	(3,179)		10	(3,189)
Gain (loss) on cash flow commodity hedge	111					111
Balance (in shares) at Mar. 31, 2023		12,667,000
Balance Treasury Stock (in shares) at Mar. 31, 2023					(806,000)
Balance at Mar. 31, 2023	305,795	$ 126	69,955	286,777	$ 24,999	(26,064)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	18,454			18,454
Foreign currency translation adjustments	2,089					2,089
Stock-based compensation	958		958
Dividends	(3,191)			(3,191)
Gain (loss) on cash flow commodity hedge	$ (35)					(35)
Balance (in shares) at Jun. 30, 2023		12,667,000
Balance Treasury Stock (in shares) at Jun. 30, 2023	(806,018)				(806,000)
Balance at Jun. 30, 2023	$ 324,070	$ 126	$ 70,913	$ 302,040	$ (24,999)	$ (24,010)