Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net loss	$ (7,877)	$ (1,867)
Items not involving cash:
Depreciation, depletion and amortization	938	1,341
Accretion of asset retirement obligations	70	63
Impairment of oil and gas properties	4,299
Unrealized commodity derivative loss	966	764
Stock-based compensation expense	663	699
Equity investment loss	6	1
Other	(7)
Net change in:
Accounts receivable	341	1,446
Prepaid expenses, deposits and other current assets	22	(75)
Accounts payable, accrued liabilities and firm transportation contract obligations	(56)	(1,723)
Net cash (used in) provided by operating activities	(635)	649
Cash flows from investing activities:
Development and acquisition of properties and equipment	(233)	(2,343)
Proceeds from sale of oil and gas properties and other assets	8	42
Other long-term assets	49	454
Equity investment distribution	275
Net cash provided by (used in) investing activities	99	(1,847)
Cash flows from financing activities:
Proceeds from notes payable	700	1,100
Payments on notes payable	(200)	(400)
Distributions to non-controlling interests	(3)	(59)
Net cash provided by financing activities	497	641
Net decrease in cash and cash equivalents	(39)	(557)
Cash and cash equivalents, beginning of period	305	1,132
Cash and cash equivalents, end of period	$ 266	$ 575