Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (8,692)	$ (9,640)
Other comprehensive loss:
Foreign currency translation adjustment, net of tax	268	(837)
Retirement plan liability adjustment, net of tax	1,768	1,211
Interest rate swap agreement adjustment, net of tax	(3)	12
Comprehensive loss	$ (6,659)	$ (9,254)