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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Current assets:    
Cash and equivalents $ 2,095 $ 3,277
Oil and gas sales receivable 1,078 687
Discontinued operations - assets of mining segment 114 114
Assets available for sale 653
Marketable securities 798 876
Transaction deposit 374 250
Other current assets 316 61
Total current assets 4,775 5,918
Oil and gas properties under full cost method:    
Unevaluated properties 4,664 4,664
Evaluated properties 86,356 86,313
Less accumulated depreciation, depletion and amortization (83,500) (83,362)
Net oil and gas properties 7,520 7,615
Other assets:    
Property and equipment, net 2,340 1,717
Other assets 62 66
Total other assets 2,402 1,783
Total assets 14,697 15,316
Accounts payable and accrued liabilities:    
Oil and gas payables 464 707
Related party payable 50
Accrued compensation and benefits 82 64
Liabilities from derivative contracts 107 161
Current portion of long-term debt 600
Total current liabilities 653 1,582
Noncurrent liabilities:    
Asset retirement obligations 919 913
Revolving credit facility 937 937
Warrant liability 930 1,200
Other liabilities 28 22
Total noncurrent liabilities 2,814 3,072
Commitments and contingencies (Note 7)
Shareholders' equity:    
Preferred stock, par value $0.01 per share. Authorized 100,000 shares, 50,000 shares of series A Convertible Preferred Stock as of 3/31/2018; liquidation preference of $2,606 as of 3/31/2018. 1 1
Common stock, $0.01 par value; unlimited shares authorized; 12,460,220 and 6,134,506 shares issued and outstanding as of 3/31/2018 and 12/31/2017, respectively 124 118
Additional paid-in capital 137,515 136,631
Accumulated deficit (125,429) (125,185)
Other comprehensive loss (981) (903)
Total shareholders' equity 11,230 10,662
Total liabilities and shareholders' equity $ 14,697 $ 15,316