Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net income (loss) from continuing operations	$ (24,721)	$ (788)	$ 2,956
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation, depletion, and amortization	2,676	3,030	2,912
Amortization of loan fees-interest expense	10	17	32
Accretion of discount on asset retirement obligation	126	114	120
Impairment	14,526	2,796
Gain on sale of vehicles/equipment	(41)	(33)	(118)
Compensation and services paid in stock options / equipment	12	32	50
Deferred income tax expense	7,351	(12)	1,915
Allowance for doubtful accounts			(84)
Changes in assets and liabilities
Restricted cash	386	121
Accounts receivable	432	576	307
Inventory and other assets	198	450	31
Accounts payable	(58)	58	103
Accrued liabilities	(398)	323	(184)
Settlement on asset retirement obligation	(17)	(113)	(69)
Net cash provided by operating activities - continuing operations	482	6,571	7,971
Net cash (used in) in operating activities - discontinued operations			(85)
Net cash provided by operating activities	482	6,571	7,886
Investing activities
Net additions to oil and gas properties	(570)	(3,708)	(2,314)
Additions to Manufactured Methane facilities		(282)	(2)
Additions to other property & equipment	(1)	(21)	(8)
Proceeds from sale of other property & equipment	30	17	106
Net cash (used in) investing activities - continuing operations	(541)	(3,994)	(2,218)
Net cash provided by investing activities - discontinued operations			1,395
Net cash (used in) investing activities	(541)	(3,994)	(823)
Financing activities
Payment in lieu of exercise of options/warrants			(60)
Proceeds from borrowings	4,300	7,709	7,946
Repayments of borrowings	(4,234)	(10,305)	(13,606)
Loan fees	(2)		(10)
Net cash provided by (used in) financing activities - continuing operations	64	(2,596)	(5,730)
Net cash provided by (used in) financing activities - discontinued operations			(1,310)
Net cash provided by (used in) financing activities	64	(2,596)	(7,040)
Net change in cash and cash equivalents - continuing operations	5	(19)	23
Cash and cash equivalents, beginning of period	35	54	31
Cash and cash equivalents, end of period	40	35	54
Supplemental cash flow information:
Cash interest payments	70	71	325
Cash paid for taxes			38
Supplemental non-cash investing and financing activities:
Financed company vehicles	140	47	188
Asset retirement obligations incurred		46	26
Revisions to asset retirement obligations	$ 112	138	(48)
Capital expenditures included in accounts payable and accrued liabilities		$ 207	$ 175