Accumulated Other Comprehensive Loss - Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 47,270	$ 46,148
Ending Balance	44,551	47,270
Amortization of net gain (loss) included in net periodic pension cost	243	185
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(5,365)	(6,094)
Change in period	(2,618)	663
Tax effect of change in period	(9)	66
Ending Balance	(7,992)	(5,365)
Effect of Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(4,106)	(4,829)
Change in period	96	723
Tax effect of change in period	0	0
Ending Balance	(4,010)	(4,106)
Minimum Pension Liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,259)	(1,265)
Change in period	(2,714)	(60)
Tax effect of change in period	(9)	66
Ending Balance	$ (3,982)	$ (1,259)