Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (7,506)	$ (7,170)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax $0 and $0, respectively	(712)	(348)
Retirement plan liability adjustment, net of tax $0 and $0, respectively	(3,968)	974
Interest rate swap agreement adjustment, net of tax $0 and $0, respectively	0
Interest rate swap agreement adjustment, net of tax $0 and $0, respectively		(4)
Comprehensive loss	$ (12,186)	$ (6,548)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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