Consolidated Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (1,491)	$ 3,260	$ 1,502	$ 1,919
Other comprehensive income:
Foreign currency translation adjustment, net of tax $0 and $0 for the three months ended and net of tax $0 and $0 for the six months ended, respectively	(303)	(130)	(17)	63
Retirement plan liability adjustment, net of tax $0 and $0 for the three months end and net of tax $0 and $0 for the six month ended, respectively	211	249	423	437
Comprehensive income (loss)	$ (1,583)	$ 3,379	$ 1,908	$ 2,419