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Accumulated Other Comprehensive Loss - Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 34,046	$ 29,534
Ending Balance	38,963	34,046
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(9,448)	(11,995)
Change in period	2,355	2,618
Tax effect of change in period	(235)	(71)
Ending Balance	(7,328)	(9,448)
Effect of Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(4,050)	(4,696)
Change in period	(1,741)	646
Tax effect of change in period	0	0
Ending Balance	(5,791)	(4,050)
Minimum Pension Liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(5,398)	(7,299)
Change in period	4,096	1,972
Tax effect of change in period	(235)	(71)
Ending Balance	$ (1,537)	$ (5,398)

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Amount before tax of other comprehensive income (loss) attributable to parent entity.

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