Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net loss	$ (1,040)	$ (1,361)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, depletion, accretion, and amortization	526	890
Debt issuance cost amortization	12	37
Change in fair value of commodity derivative	(161)	161
Change in fair value of warrants	(775)	170
Bad debt write-off	374
Interest change in major operator		(141)
Gain on sale of oil and natural gas properties		(4,318)
Loss on conversion of debt to equity		4,440
Gain on sale of assets		(3)
Stock-based compensation and services	636	323
Loss on marketable equity securities	339	(777)
Other	3	36
Decrease (increase) in:
Oil and natural gas sales receivable	(10)	(125)
Transaction deposit	(124)	(250)
Other assets	16	91
Increase (decrease) in:
Accounts payable and related party payable	(283)	(76)
Accrued compensation and benefits	(3)	11
Net cash used in operating activities	(490)	(892)
Cash flows from investing activities:
Oil and natural gas capital expenditures	(1,301)	(299)
Settlement of asset retirement obligations	(18)
Proceeds from sale of oil and natural gas properties and other		2,000
Purchase of property and equipment	(11)
Payment received on notes receivable	20
Net cash (used in) provided by investing activities:	(1,310)	1,701
Cash flows from financing activities:
Issuance of common stock, net of fees	1,666	(27)
Shares repurchased for employee tax withholding	(203)
Payments on credit facility	(600)	(23)
Net cash provided by (used in) financing activities	863	(50)
Net (decrease) increase in cash and equivalents	(937)	759
Cash and equivalents, beginning of year	3,277	2,518
Cash and equivalents, end of year	2,340	3,277
Supplemental disclosures of cash flow information and non-cash activities:
Cash payments for interest	119	451
Cash payments for income taxes
Investing activities:
Change in capital expenditure accruals	196	48
Additions to asset retirement obligations	19	3
Asset retirement obligations assumed by purchaser		(167)
Reclassification of assets classified as held-for-sale at December 31, 2017 to other assets	653
Financing activities:
Payable to major operator forgiven		$ 3,999

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- Definition

The cash inflow from the additional capital contribution to the entity.

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-SubTopic 10
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- Definition

The cash inflow associated with the proceeds from sale of notes receivable, as well as principal collections from a borrowing supported by a written promise to pay an obligation (note receivable).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Aggregate cash proceeds received from a combination of transactions that are classified as investing activities in which assets, which may include one or more investments, are sold to third-party buyers. This element can be used by entities to aggregate proceeds from all asset sales that are classified as investing activities.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
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- Definition

Amount of noncash expense for share-based payment arrangement.

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- References

No definition available.

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

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