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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash flows from operating activities:      
Net loss $ (1,360) $ (14,120) $ (92,896)
Loss from discontinued operations 2,448 25,612
Loss from continuing operations (1,360) (11,672) (67,284)
Adjustments to reconcile loss from continuing operations to net cash provided by / (used in) operating activities:      
Depreciation, depletion, accretion, and amortization 890 2,529 8,557
Debt amortization
Impairment of oil and gas properties 9,568 57,676
Change in fair value of oil price risk derivative 161 1,634 (1,634)
Interest change in Major Operator (141) (1,476)
Gain on sale of oil and gas properties (4,318)
Loss on conversion of debt to equity 4,440
Gain on sale of assets (3) (102) (121)
Stock-based compensation and services 323 213 948
(Gain)/loss on Warrants 170 (210)
Other (704) (372) (110)
Decrease (increase) in:      
Oil and gas sales receivable (125) 580 2,034
Other assets (159) 86 63
Increase (decrease) in:      
Accounts payable (77) (1,050) 1,126
Major operator overpayments 1,429
Accrued compensation and benefits 11 (1,133) (188)
Other liabilities 8
Net cash provided by / (used in) operating activities (892) (1,405) 2,504
Cash flows from investing activities:      
Capital expenditures (299) (194) (3,620)
Proceeds from sale of oil and gas properties and other 2,000 264
Proceeds from settlement of property litigation 1,500
Net change in restricted investments 1,291
Net cash provided by / (used) in investing activities: 1,701 (194) (565)
Cash flows from financing activities:      
Issuance of common stock (27) 1,317
Redemption of common stock (3) (29)
Payments for debt issuance costs (23) (103) (125)
Net cash provided by / (used in) financing activities (50) 1,211 (154)
Discontinued operations:      
Net cash used in operating activities (448) (2,440)
Net cash used in investing activities (1)
Net cash used in discontinued operations (448) (2,441)
Net increase (decrease) in cash and equivalents 759 (836) (656)
Cash and equivalents, beginning of year 2,518 3,354 4,010
Cash and equivalents, end of year 3,277 2,518 3,354
Supplemental disclosures of cash flow information:      
Cash payments for income taxes
Cash payments for interest 451 442 210
Non-cash investing and financing activities:      
Unrealized gain/(loss) on marketable equity securities (848) (55) 56
Fees incurred during equity for debt conversion and common stock sales agreement 114
Debt Long Term to Short Term 600
Payable to Major Operator forgiven 3,999
Increase (decrease) in accrued capital expenditures for oil and gas properties 48 112 (112)
Asset Retirement obligations assumed by Purchaser (167) (1)
Net additions to oil and gas properties through asset retirement obligations $ 3 $ 61