CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss	Treasury Stock	Non-controlling Interests
Balance, beginning of period (in shares) at Sep. 30, 2019		8,277,160
Balance, beginning of period at Sep. 30, 2019	$ 1,329	$ 4,223	$ 1,350	$ 859	$ (2,917)	$ (2,286)	$ 100
Increase (Decrease) in Stockholders' Equity
Net earnings (loss)	(419)			(414)			(5)
Foreign currency translation adjustments, net of taxes of $0	5				5
Retirement plans:
Amortization of accumulated other comprehensive loss into net periodic benefit cost, net of taxes of $0	60				60
Net actuarial gains arising during the period, net of taxes of $0	880				880
Curtailment gain, net of taxes of $0	1,699				1,699
Balance, end of period (in shares) at Dec. 31, 2019		8,277,160
Balance, end of period at Dec. 31, 2019	3,554	$ 4,223	1,350	445	(273)	(2,286)	95
Balance, beginning of period (in shares) at Sep. 30, 2020		8,277,160
Balance, beginning of period at Sep. 30, 2020	(1,953)	$ 4,223	1,350	(3,897)	(1,435)	(2,286)	92
Increase (Decrease) in Stockholders' Equity
Net earnings (loss)	743			584			159
Foreign currency translation adjustments, net of taxes of $0	(234)				(234)
Distributions to non-controlling interests	(248)						(248)
Retirement plans:
Amortization of accumulated other comprehensive loss into net periodic benefit cost, net of taxes of $0	33				33
Net actuarial gains arising during the period, net of taxes of $0	0
Curtailment gain, net of taxes of $0	0
Balance, end of period (in shares) at Dec. 31, 2020		8,277,160
Balance, end of period at Dec. 31, 2020	$ (1,659)	$ 4,223	$ 1,350	$ (3,313)	$ (1,636)	$ (2,286)	$ 3