Consolidated Statements Of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating activities
Net loss from operations	$ (4,199,000)	$ (24,721,000)	$ (788,000)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation, depletion, and amortization	1,139,000	2,676,000	3,030,000
Amortization of loan fees-interest expenses	11,000	10,000	17,000
Accretion of discount on asset retirement obligation	143,000	126,000	114,000
Impairment	2,805,000	14,526,000	2,796,000
Gain on sale of vehicles/equipment		(41,000)	(33,000)
Compensation and services paid in stock options / equipment	17,000	12,000	32,000
Deferred income tax expense		7,351,000	(12,000)
Changes in assets and liabilities
Restricted cash		386,000	121,000
Accounts receivable	(46,000)	432,000	576,000
Inventory and other assets	(238,000)	198,000	450,000
Accounts payable	(482,000)	(58,000)	58,000
Accrued liabilities	(89,000)	(398,000)	323,000
Settlement on asset retirement obligations	(73,000)	(17,000)	(113,000)
Net cash provided by (used in) operating activities	(1,012,000)	482,000	6,571,000
Investing activities
Additions to oil and gas properties	(397,000)	(570,000)	(3,708,000)
Sales oil and gas properties	44,000
Additions to Manufactured Methane facilities	(47,000)		(282,000)
Additions to other property & equipment	(5,000)	(1,000)	(21,000)
Proceeds from sale of other property & equipment	4,000	30,000	17,000
Net cash (used in) investing activities	(401,000)	(541,000)	(3,994,000)
Financing activities
Proceeds from borrowings	3,850,000	4,300,000	7,709,000
Repayment of borrowings	(2,376,000)	(4,234,000)	(10,305,000)
Loan fees	(25,000)	(2,000)
Net cash provided by (used in) financing activities	1,449,000	64,000	(2,596,000)
Net change in cash and cash equivalents	36,000	5,000	(19,000)
Cash and cash equivalents, beginning of period	40,000	35,000	54,000
Cash and cash equivalents, end of period	76,000	40,000	35,000
Supplemental cash flow information:
Cash interest payments	91,000	70,000	71,000
Supplemental non-cash investing and financing activities:
Financed company vehicles	23,000	140,000	47,000
Asset retirement obligations incurred	2,000		46,000
Revisions to asset retirement obligations	(210,000)	$ 112,000	138,000
Capital expenditures included in accounts payable and accrued liabilities	$ 7,000		$ 207,000