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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Current assets: |  |
Cash and equivalents | $ 1,204 | $ 3,354
Marketable equity securities | 1,922 | 251
Oil and gas sales receivable | 694 | 1,143
Assets held for sale | 653 |
Prepaid expenses and other | 234 | 136
Oil price risk derivatives | 77 | 1,634
Discontinued operations - assets of mining segment | 135 | 318
Total current assets | 4,919 | 6,836
Oil and gas properties under full cost method: |  |
Unevaluated properties | 4,665 | 5,664
Evaluated properties | 89,436 | 97,912
Less accumulated depreciation, depletion and amortization | (82,433) | (80,144)
Net oil and gas properties | 11,668 | 23,432
Other assets: |  |
Property and equipment, net | 1,898 | 2,658
Other assets | 169 | 206
Total other assets | 2,067 | 2,864
Total assets | 18,654 | 33,132
Accounts payable and accrued liabilities: |  |
Payable to major operator | 2,394 | 4,159
Contingent ownership interests | 4,582 | 3,108
Trade payables and accrued expenses | 972 | 1,791
Accrued compensation and benefits | 62 | 1,352
Borrowings under credit agreement | 6,000 | 6,000
Discontinued operations of mining properties |  | 204
Total current liabilities | 14,010 | 16,614
Noncurrent liabilities: |  |
Asset retirement obligations | 1,063 | 1,038
Other accrued liabilities | 3 | 5
Total noncurrent liabilities | 1,066 | 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 $2,097 as of September 30, 2016 | 1 |
Common stock, $0.01 par value; unlimited shares authorized; issued and outstanding 5,134,506 shares in 2016 and 4,699,956 shares in 2015 | 51 | 47
Additional paid-in capital | 127,393 | 125,133
Accumulated deficit | (124,788) | (109,705)
Other comprehensive income | 921 |
Total shareholders' equity | 3,578 | 15,475
Total liabilities and shareholders' equity | $ 18,654 | $ 33,132

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