CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Current assets:
Cash and cash equivalents	$ 3,386	$ 4,613
Accounts and other receivables, net of allowance for doubtful accounts of: $184,000 at March 31, 2020; $44,000 at September 30, 2019	2,536	1,884
Income taxes receivable	514	386
Other current assets	1,597	1,821
Total current assets	8,033	8,704
Income taxes receivable, net of current portion	0	230
Asset for retirement benefits	1,493	0
Investments	912	980
Operating lease right-of-use assets	292
Property and equipment	71,203	72,522
Accumulated depletion, depreciation, and amortization	(63,168)	(64,134)
Property and equipment, net	8,035	8,388
Total assets	18,765	18,302
Current liabilities:
Accounts payable	2,146	1,223
Accrued capital expenditures	879	287
Accrued compensation	183	205
Accrued operating and other expenses	974	1,079
Current portion of operating lease liabilities	102
Current portion of asset retirement obligation	556	330
Other current liabilities	1,152	1,644
Total current liabilities	5,992	4,768
Deferred rent	0	193
Operating lease liabilities	196
Liability for retirement benefits	4,643	5,785
Asset retirement obligation	5,635	6,059
Deferred income tax liabilities	159	168
Total liabilities	16,625	16,973
Commitments and contingencies
Equity:
Common stock, par value $0.50 per share; authorized, 20,000,000 shares: 8,445,060 issued at March 31, 2020 and September 30, 2019	4,223	4,223
Additional paid-in capital	1,350	1,350
(Accumulated deficit) retained earnings	(1,069)	859
Accumulated other comprehensive loss, net	(169)	(2,917)
Treasury stock, at cost: 167,900 shares at March 31, 2020 and September 30, 2019	(2,286)	(2,286)
Total stockholders' equity	2,049	1,229
Non-controlling interests	91	100
Total equity	2,140	1,329
Total liabilities and equity	$ 18,765	$ 18,302