CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Current assets:
Cash and cash equivalents	$ 9,500	$ 4,584
Accounts and other receivables, net of allowance for doubtful accounts of: $398,000 at June 30, 2021; $341,000 at September 30, 2020	1,988	2,176
Income taxes receivable	59	472
Asset held for sale	699	699
Deferred offering costs	294	0
Other current assets	2,305	1,556
Total current assets	14,845	9,487
Asset for retirement benefits	987	771
Investments	0	901
Operating lease right-of-use assets	173	249
Property and equipment	79,412	73,431
Accumulated depletion, impairment, depreciation, and amortization	(75,595)	(69,657)
Property and equipment, net	3,817	3,774
Total assets	19,822	15,182
Current liabilities:
Accounts payable	2,451	2,104
Accrued capital expenditures	562	542
Accrued compensation	904	408
Accrued operating and other expenses	1,333	1,325
Current portion of operating lease liabilities	80	111
Current portion of asset retirement obligation	965	647
Other current liabilities	215	1,227
Total current liabilities	6,510	6,364
Long-term debt	48	58
Operating lease liabilities	96	143
Liability for retirement benefits	2,038	4,829
Asset retirement obligation	5,966	5,547
Deferred income tax liabilities	359	194
Total liabilities	15,017	17,135
Commitments and contingencies
Equity:
Common stock, par value $0.50 per share; authorized, 20,000,000 shares: 9,031,606 issued at June 30, 2021; 8,445,060 issued at September 30, 2020	4,516	4,223
Additional paid-in capital	3,023	1,350
Retained earnings (accumulated deficit)	809	(3,897)
Accumulated other comprehensive loss, net	(1,195)	(1,435)
Treasury stock, at cost: 167,900 shares at June 30, 2021 and September 30, 2020	(2,286)	(2,286)
Total stockholders’ equity (deficit)	4,867	(2,045)
Non-controlling interests	(62)	92
Total equity (deficit)	4,805	(1,953)
Total liabilities and equity	$ 19,822	$ 15,182