CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net earnings (loss)	$ 1,560	$ (2,861)
Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities:
Equity in income of affiliates	(2,156)	(416)
Depletion, depreciation, and amortization	708	753
Distribution of income from equity investees	2,164	0
Retirement benefits expense	345	265
Accretion of asset retirement obligation	213	226
Deferred income tax expense (benefit)	114	(89)
Asset retirement obligation payments	(480)	(125)
Share-based compensation expense (benefit)	45	(23)
Retirement plan contributions	(355)	(353)
Sale of interest in leasehold land, net of fees paid	(1,418)	(413)
Decrease from changes in current assets and liabilities	(424)	(1,571)
Net cash provided by (used in) operating activities	316	(4,607)
Cash flows from investing activities:
Distribution from equity investees in excess of earnings	652	0
Proceeds from sale of interest in leasehold land, net of fees paid	1,418	413
Decrease in restricted cash	0	4,957
Capital expenditures - oil and natural gas	(447)	(598)
Capital expenditures - all other	(120)	(39)
Net cash provided by investing activities	1,503	4,733
Cash flows from financing activities:
Distributions to non-controlling interests	(616)	(86)
Decrease in restricted cash	0	166
Net cash (used in) provided by financing activities	(616)	80
Effect of exchange rate changes on cash and cash equivalents	(98)	272
Net increase in cash and cash equivalents	1,105	478
Cash and cash equivalents at beginning of period	15,550	8,471
Cash and cash equivalents at end of period	$ 16,655	$ 8,949