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