CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Current assets:
Cash and cash equivalents	$ 4,387	$ 4,584
Accounts and other receivables, net of allowance for doubtful accounts of: $368,000 at March 31, 2021; $341,000 at September 30, 2020	2,331	2,176
Income taxes receivable	474	472
Asset held for sale	699	699
Deferred offering costs	483	0
Other current assets	1,954	1,556
Total current assets	10,328	9,487
Asset for retirement benefits	915	771
Investments	159	901
Operating lease right-of-use assets	201	249
Other non-current asset	250	0
Property and equipment	77,373	73,431
Accumulated depletion, impairment, depreciation, and amortization	(74,457)	(69,657)
Property and equipment, net	2,916	3,774
Total assets	14,769	15,182
Current liabilities:
Accounts payable	2,731	2,104
Accrued capital expenditures	184	542
Accrued compensation	547	408
Accrued operating and other expenses	1,147	1,325
Current portion of operating lease liabilities	103	111
Current portion of asset retirement obligation	869	647
Other current liabilities	563	1,227
Total current liabilities	6,144	6,364
Long-term debt	64	58
Operating lease liabilities	101	143
Liability for retirement benefits	4,887	4,829
Asset retirement obligation	5,780	5,547
Deferred income tax liabilities	208	194
Total liabilities	17,184	17,135
Commitments and contingencies
Equity:
Common stock, par value $0.50 per share; authorized, 20,000,000 shares: 8,445,060 issued at March 31, 2021 and September 30, 2020	4,223	4,223
Additional paid-in capital	1,501	1,350
Accumulated deficit	(4,169)	(3,897)
Accumulated other comprehensive loss, net	(1,688)	(1,435)
Treasury stock, at cost: 167,900 shares at March 31, 2021 and September 30, 2020	(2,286)	(2,286)
Total stockholders’ deficit	(2,419)	(2,045)
Non-controlling interests	4	92
Total deficit	(2,415)	(1,953)
Total liabilities and equity	$ 14,769	$ 15,182