Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net loss	$ (729)	$ (5,383)
Other comprehensive income (loss):
Foreign currency translation adjustment, net of tax	5,554	374
Retirement plan liability adjustment, net of tax	1,498	904
Interest rate swap agreement adjustment, net of tax	(2)	(7)
Comprehensive income (loss)	$ 6,321	$ (4,112)