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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash flows from operating activities:      
Net loss $ (14,120) $ (92,896) $ (2,091)
Loss from discontinued operations 2,448 25,612 3,108
Loss from continuing operations (11,672) (67,284) 1,017
Adjustments to reconcile loss from continuing operations to net cash provided by/(used in) operating activities:      
Depreciation, depletion and amortization 2,259 8,557 14,833
Impairment of oil and gas properties 9,568 57,676
Change in fair value of oil price risk derivative 1,634 (1,634) (266)
Interest change in Major Operator (1,476)
Gain on sale of assets (102) (121) (112)
Stock-based compensation and services 213 948 527
Gain on Warrants (210)
Other (372) (110) 585
Decrease (increase) in:      
Oil and gas sales receivable 580 2,034 (2,571)
Other assets 86 63 165
Increase (decrease) in:      
Accounts payable (1,050) 1,126 909
Oil and gas operator overpayments 1,429 3,983
Accrued compensation and benefits (1,133) (188) (436)
Other liabilities (8) (39)
Net cash provided by/(used in) operating activities (1,405) 2,504 23,737
Cash flows from investing activities:      
Capital expenditures (193) (3,620) (31,044)
Proceeds from sale of oil and gas properties and other   264 11,624
Proceeds from settlement of property litigation 1,500
Net change in restricted investments (1,291) (122)
Net cash used in investing activities: (193) (565) (19,542)
Cash flows from financing activities:      
Issuance of common stock and warrants 1,317
Redemption of common stock (3) (29) (55)
Proceeds from debt financings 8,000
Principal payments under debt financings (11,000)
Payments for debt issuance costs (103) (125)
Net cash provided by/(used in) financing activities 1,211 (154) (3,055)
Discontinued operations:      
Net cash used in operating activities (448) (2,440) (2,985)
Net cash used in investing activities (1)
Net cash used in discontinued operations (448) (2,441) (2,985)
Net decrease in cash and equivalents (835) (656) (1,845)
Cash and equivalents, beginning of year 3,354 4,010 5,855
Cash and equivalents, end of year 2,518 3,354 4,010
ARO and Mining properties disposal (1)
Net Non-cash activities (1)
Supplemental disclosures of cash flow information:      
Cash payments for income taxes
Cash payments for interest 442 210 385
Non-cash investing and financing activities:      
Unrealized gain/(loss) on marketable equity securities 55 56 (44)
Increase (decrease) in accrued capital expenditures for oil and gas properties 112 (112) (2,565)
Net additions to oil and gas properties through asset retirement obligations $ 61 $ 281