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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Current assets:    
Cash and equivalents $ 1,360 $ 3,354
Marketable equity securities 1,178 251
Oil and gas sales receivable 834 1,143
Assets held for sale 653
Prepaid expenses and other 319 136
Oil price risk derivatives 174 1,634
Discontinued operations - assets of mining segment 135 318
Total current assets 4,653 6,836
Oil and gas properties under full cost method:    
Unevaluated properties 4,665 5,664
Evaluated properties 89,402 97,912
Less accumulated depreciation, depletion and amortization (81,774) (80,144)
Net oil and gas properties 12,293 23,432
Other assets:    
Property and equipment, net 1,934 2,658
Other assets 158 206
Total other assets 2,092 2,864
Total assets 19,038 33,132
Accounts payable and accrued liabilities:    
Payable to major operator 3,302 4,159
Contingent ownership interests 3,593 3,108
Trade payables and accrued expenses 1,216 1,791
Accrued compensation and benefits 51 1,352
Current portion of long-term debt 6,000 6,000
Discontinued operations of mining properties 204
Total current liabilities 14,162 16,614
Noncurrent liabilities:    
Asset retirement obligations 1,054 1,038
Other accrued liabilities 173 5
Total noncurrent liabilities 1,227 1,043
Commitments and contingencies (Note 9)
Shareholders' equity:    
Preferred stock, par value $0.01 per share. Authorized 100,000 shares, issued and outstanding 50,000 shares of Series A Convertible Preferred Stock in 2016; liquidation preference of $2,034 as of June 30, 2016 1
Common stock, $0.01 par value; unlimited shares authorized; issued and outstanding 4,704,267 shares in 2016 and 4,699,956 shares in 2015 47 47
Additional paid-in capital 127,197 125,133
Accumulated deficit (124,523) (109,705)
Other comprehensive income 927
Total shareholders' equity 3,649 15,475
Total liabilities and shareholders' equity $ 19,038 $ 33,132