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, 2022		12,588,000
Balance Treasury Stock (in shares) at Sep. 30, 2022					(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 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					(806,000)
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)	9,636
Foreign currency translation adjustments	2,605
Gain on cash flow commodity hedge	329
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)
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 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)
Balance (in shares) at Sep. 30, 2023	11,861,983	12,668,000
Balance Treasury Stock (in shares) at Sep. 30, 2023	(806,018)				(806,000)
Balance at Sep. 30, 2023	$ 345,026	$ 127	71,526	325,281	$ 24,999	(26,909)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	24,085			24,085
Foreign currency translation adjustments	3,085					3,085
Stock-based compensation (in shares)		98,000
Stock-based compensation	1,657		1,657
Shares withheld in lieu of employee tax withholding	(4,752)		(4,752)
Dividends	(2,781)		423	(3,204)
Balance (in shares) at Dec. 31, 2023		12,766,000
Balance Treasury Stock (in shares) at Dec. 31, 2023					(806,000)
Balance at Dec. 31, 2023	$ 366,320	$ 127	68,854	346,162	$ 24,999	(23,824)
Balance (in shares) at Sep. 30, 2023	11,861,983	12,668,000
Balance Treasury Stock (in shares) at Sep. 30, 2023	(806,018)				(806,000)
Balance at Sep. 30, 2023	$ 345,026	$ 127	71,526	325,281	$ 24,999	(26,909)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	57,573
Foreign currency translation adjustments	816
Gain on cash flow commodity hedge	$ 0
Balance (in shares) at Mar. 31, 2024	11,987,838	12,794,000
Balance Treasury Stock (in shares) at Mar. 31, 2024	(806,018)				(806,000)
Balance at Mar. 31, 2024	$ 393,785	$ 128	68,348	376,401	$ 24,999	(26,093)
Balance (in shares) at Dec. 31, 2023		12,766,000
Balance Treasury Stock (in shares) at Dec. 31, 2023					(806,000)
Balance at Dec. 31, 2023	366,320	$ 127	68,854	346,162	$ 24,999	(23,824)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	33,488			33,488
Foreign currency translation adjustments	(2,269)					(2,269)
Stock-based compensation (in shares)		28,000
Stock-based compensation	1,206	$ 1	1,205
Shares withheld in lieu of employee tax withholding	(1,724)		(1,724)
Dividends	(3,236)		13	(3,249)
Gain on cash flow commodity hedge	$ 0
Balance (in shares) at Mar. 31, 2024	11,987,838	12,794,000
Balance Treasury Stock (in shares) at Mar. 31, 2024	(806,018)				(806,000)
Balance at Mar. 31, 2024	$ 393,785	$ 128	$ 68,348	$ 376,401	$ 24,999	$ (26,093)