CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019
Current assets:
Cash and cash equivalents	$ 2,399	$ 4,613
Accounts and other receivables, net of allowance for doubtful accounts of: $45,000 at December 31, 2019; $44,000 at September 30, 2019	3,220	1,884
Income taxes receivable	379	386
Operating lease right-of-use asset held for sale	2,226
Other current assets	1,681	1,821
Total current assets	9,905	8,704
Income taxes receivable, net of current portion	230	230
Asset for retirement benefits	1,393	0
Investments	937	980
Operating lease right-of-use assets	331
Property and equipment	76,560	72,522
Accumulated depletion, depreciation, and amortization	(66,034)	(64,134)
Property and equipment, net	10,526	8,388
Total assets	23,322	18,302
Current liabilities:
Accounts payable	1,109	1,223
Accrued capital expenditures	1,984	287
Accrued compensation	159	205
Accrued operating and other expenses	1,097	1,079
Operating lease liability held for sale	2,441
Current portion of operating lease liabilities	108
Current portion of asset retirement obligation	720	330
Other current liabilities	1,055	1,644
Total current liabilities	8,673	4,768
Deferred rent	0	193
Operating lease liabilities	230
Liability for retirement benefits	4,609	5,785
Asset retirement obligation	6,097	6,059
Deferred income tax liabilities	159	168
Total liabilities	19,768	16,973
Commitments and contingencies
Equity:
Common stock, par value $0.50 per share; authorized, 20,000,000 shares: 8,445,060 issued at December 31, 2019 and September 30, 2019	4,223	4,223
Additional paid-in capital	1,350	1,350
Retained earnings	445	859
Accumulated other comprehensive loss, net	(273)	(2,917)
Treasury stock, at cost: 167,900 shares at December 31, 2019 and September 30, 2019	(2,286)	(2,286)
Total stockholders' equity	3,459	1,229
Non-controlling interests	95	100
Total equity	3,554	1,329
Total liabilities and equity	$ 23,322	$ 18,302