CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net earnings (loss)	$ (371)	$ 1,560
Adjustments to reconcile net earnings (loss) to net cash (used in) provided by operating activities:
Equity in loss (income) of affiliates	233	(2,156)
Depletion, depreciation, and amortization	507	708
Gain on sale of oil and natural gas properties	2,250	0
Impairment of assets	37	0
Distribution of income from equity investees	0	2,164
Retirement benefits expense	148	345
Income tax receivable	(460)	0
Deferred rent liability	43	0
Accretion of asset retirement obligation	136	213
Deferred income tax expense	523	114
Asset retirement obligation payments	(538)	(480)
Share-based compensation expense (benefit)	(26)	45
Retirement plan contributions and payments	(210)	(355)
Sale of interest in leasehold land, net of fees paid	0	(1,418)
Decrease from changes in current assets and liabilities	(1,233)	(424)
Net cash (used in) provided by operating activities	(3,461)	316
Cash flows from investing activities:
Purchase of certificates of deposit	(3,958)	0
Proceeds from the maturity of certificates of deposit	3,176	0
Distribution from equity investees in excess of earnings	0	652
Net (fees paid on) proceeds from sale of interest in leasehold land	(343)	1,418
Proceeds from the sale of oil and natural gas properties	763	0
Capital expenditures - oil and natural gas	(288)	(447)
Capital expenditures - all other	(65)	(120)
Net cash (used in) provided by investing activities	(715)	1,503
Cash flows from financing activities:
Distributions to non-controlling interests	(506)	(616)
Net cash used in financing activities	(506)	(616)
Effect of exchange rate changes on cash and cash equivalents	(206)	(98)
Net (decrease) increase in cash and cash equivalents	(4,888)	1,105
Cash and cash equivalents at beginning of period	16,281	15,550
Cash and cash equivalents at end of period	$ 11,393	$ 16,655