CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Current assets:
Cash and cash equivalents	$ 5,334	$ 4,584
Accounts and other receivables, net of allowance for doubtful accounts of: $362,000 at December 31, 2020; $341,000 at September 30, 2020	2,034	2,176
Income taxes receivable	448	472
Asset held for sale	699	699
Other current assets	1,464	1,556
Total current assets	9,979	9,487
Asset for retirement benefits	843	771
Investments	88	901
Operating lease right-of-use assets	227	249
Property and equipment	76,217	73,431
Accumulated depletion, depreciation, and amortization	(73,313)	(69,657)
Property and equipment, net	2,904	3,774
Total assets	14,041	15,182
Current liabilities:
Accounts payable	1,257	2,104
Accrued capital expenditures	336	542
Accrued compensation	390	408
Accrued operating and other expenses	1,032	1,325
Current portion of operating lease liabilities	116	111
Current portion of asset retirement obligation	605	647
Other current liabilities	873	1,227
Total current liabilities	4,609	6,364
Long-term debt	98	58
Operating lease liabilities	115	143
Liability for retirement benefits	4,858	4,829
Asset retirement obligation	5,787	5,547
Deferred income tax liabilities	233	194
Total liabilities	15,700	17,135
Commitments and contingencies
Equity:
Common stock, par value $0.50 per share; authorized, 20,000,000 shares: 8,445,060 issued at December 31, 2020 and September 30, 2020	4,223	4,223
Additional paid-in capital	1,350	1,350
Accumulated deficit	(3,313)	(3,897)
Accumulated other comprehensive loss, net	(1,636)	(1,435)
Treasury stock, at cost: 167,900 shares at December 31, 2020 and September 30, 2020	(2,286)	(2,286)
Total stockholders' deficit	(1,662)	(2,045)
Non-controlling interests	3	92
Total deficit	(1,659)	(1,953)
Total liabilities and equity	$ 14,041	$ 15,182