CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (DEFICIT) (Unaudited) - 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 (Deficit)
Net (loss) earnings	(5,404)			(5,384)			(20)
Foreign currency translation adjustments, net of taxes of $0	(36)				(36)
Retirement plans:
Amortization of accumulated other comprehensive loss into net periodic benefit cost, net of taxes of $0	100				100
Net actuarial gains arising during the period, net of taxes of $0	880				880
Curtailment gain and gain on termination of post-retirement medical plan, net of taxes of $0	1,699				1,699
Balance, end of period (in shares) at Jun. 30, 2020		8,277,160
Balance, end of period at Jun. 30, 2020	(1,432)	$ 4,223	1,350	(4,525)	(274)	(2,286)	80
Balance, beginning of period (in shares) at Mar. 31, 2020		8,277,160
Balance, beginning of period at Mar. 31, 2020	2,140	$ 4,223	1,350	(1,069)	(169)	(2,286)	91
Increase (Decrease) in Stockholders' Equity (Deficit)
Net (loss) earnings	(3,467)			(3,456)			(11)
Foreign currency translation adjustments, net of taxes of $0	(125)				(125)
Retirement plans:
Amortization of accumulated other comprehensive loss into net periodic benefit cost, net of taxes of $0	20				20
Net actuarial gains arising during the period, net of taxes of $0	0
Balance, end of period (in shares) at Jun. 30, 2020		8,277,160
Balance, end of period at Jun. 30, 2020	(1,432)	$ 4,223	1,350	(4,525)	(274)	(2,286)	80
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 (Deficit)
Net (loss) earnings	5,503			4,706			797
Foreign currency translation adjustments, net of taxes of $0	(393)				(393)
Distributions to non-controlling interests	(951)						(951)
Share-based compensation	389		389
Issuance of common stock, net of costs (in shares)		586,546
Issuance of common stock, net of costs	1,577	$ 293	1,284
Retirement plans:
Amortization of accumulated other comprehensive loss into net periodic benefit cost, net of taxes of $0	92				92
Net actuarial gains arising during the period, net of taxes of $0	0
Curtailment gain and gain on termination of post-retirement medical plan, net of taxes of $0	541				541
Balance, end of period (in shares) at Jun. 30, 2021		8,863,706
Balance, end of period at Jun. 30, 2021	4,805	$ 4,516	3,023	809	(1,195)	(2,286)	(62)
Balance, beginning of period (in shares) at Mar. 31, 2021		8,277,160
Balance, beginning of period at Mar. 31, 2021	(2,415)	$ 4,223	1,501	(4,169)	(1,688)	(2,286)	4
Increase (Decrease) in Stockholders' Equity (Deficit)
Net (loss) earnings	5,554			4,978			576
Foreign currency translation adjustments, net of taxes of $0	(74)				(74)
Distributions to non-controlling interests	(642)						(642)
Share-based compensation	238		238
Issuance of common stock, net of costs (in shares)		586,546
Issuance of common stock, net of costs	1,577	$ 293	1,284
Retirement plans:
Amortization of accumulated other comprehensive loss into net periodic benefit cost, net of taxes of $0	26				26
Net actuarial gains arising during the period, net of taxes of $0	0
Curtailment gain and gain on termination of post-retirement medical plan, net of taxes of $0	541				541
Balance, end of period (in shares) at Jun. 30, 2021		8,863,706
Balance, end of period at Jun. 30, 2021	$ 4,805	$ 4,516	$ 3,023	$ 809	$ (1,195)	$ (2,286)	$ (62)