CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net earnings (loss)	$ 5,554	$ (3,467)	$ 5,503	$ (5,404)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Equity in (income) loss of affiliates	(3,348)	111	(5,026)	179
Depletion, depreciation, and amortization	235	478	738	1,870
Gain on sale of asset	0	0	0	(1,336)
Impairment of assets	0	2,689	630	4,326
Sale of interest in leasehold land, net of fees paid			(1,526)	0
Distributions of income from equity investees			4,278	0
Retirement benefits income			(38)	(18)
Non-cash rent (income) expense			(3)	48
Accretion of asset retirement obligation			432	415
Deferred income tax expense (benefit)	151	2	165	(7)
Asset retirement obligation payments			(316)	(457)
Share-based compensation expense			389	0
Retirement plan contributions and payments			(5)	(6)
Bad debt expense			33	280
Gain on debt extinguishment	(149)	0	(149)	0
Gain on termination of post-retirement medical plan	(2,341)	0	(2,341)	0
(Decrease) increase from changes in current assets and liabilities			(659)	582
Net cash provided by operating activities			2,105	472
Cash flows from investing activities:
Proceeds from sale of interest in leasehold land, net of fees paid			1,526	0
Distribution from equity investees in excess of earnings			1,649	0
Proceeds from the sale of asset			0	1,100
Proceeds from the sale of oil and natural gas assets			60	608
Payments to acquire oil and natural gas properties			(348)	0
Capital expenditures - oil and natural gas			(904)	(2,509)
Capital expenditures - all other			(28)	(315)
Net cash provided by (used in) investing activities			1,955	(1,116)
Cash flows from financing activities:
Borrowings on long-term debt			47	147
Distributions to non-controlling interests			(951)	0
Proceeds from issuance of stock, net of costs			1,736	0
Net cash provided by financing activities			832	147
Effect of exchange rate changes on cash and cash equivalents			24	(10)
Net increase (decrease) in cash and cash equivalents			4,916	(507)
Cash and cash equivalents at beginning of period			4,584	4,613
Cash and cash equivalents at end of period	$ 9,500	$ 4,106	$ 9,500	$ 4,106