UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net loss	$ (15,083)	$ (53,634)
Loss from discontinued operations	2,448	2,385
Loss from continuing operations	(12,635)	(51,249)
Adjustments to reconcile loss from continuing operations to net cash provided by (used in) operating activities:
Depreciation, depletion and amortization	2,422	7,306
Impairment of oil and gas properties	9,568	43,894
Change in fair value of oil price risk derivative	1,557	(1,002)
Amortization of debt issuance costs	221	42
Stock-based compensation	98	331
Gain on receipt of marketable equity securities	(750)	(238)
Gain on sale of assets	(100)	(57)
Decrease (increase) in:
Oil and gas sales receivable	449	2,092
Other assets	(74)	(4)
Increase (decrease) in:
Accounts payable and other liabilities	(1,111)	2,241
Accrued compensation and benefits	(1,120)	275
Net cash provided by (used in) operating activities	(1,475)	3,631
Cash flows from investing activities:
Capital expenditures	(121)	(3,880)
Proceeds from settlement of lawsuit involving oil and gas properties		1,500
Proceeds from sale of property and equipment		136
Net change in restricted investments		885
Net cash used in investing activities:	(121)	(1,359)
Cash flows from financing activities:
Proceeds from issuance of preferred stock	1
Payment to cancel shares of common stock		(20)
Payments for debt issuance costs	(105)
Cash payment for fractional shares in reverse stock split	(3)
Net cash used in financing activities	(107)	(20)
Discontinued operations:
Net cash used in operating activities for discontinued operations	(447)	(2,295)
Net increase (decrease) in cash and equivalents	(2,150)	(43)
Cash and equivalents, beginning of period	3,354	4,010
Cash and equivalents, end of period	1,204	3,967
Supplemental disclosures of cash flow information:
Income tax paid
Interest paid	144	129
Non-cash investing and financing activities:
Issuance of preferred stock in disposition of mining segment	1,999
Elimination of asset retirement obligations in disposition of mining segment	204
Unrealized gain (loss) on marketable equity securities	(750)	(238)
Net additions to oil and gas properties through asset retirement obligations	1	62
Increase (decrease) in accrued capital expenditures		1,325
Issuance of common stock to settle ESOP liability	$ 170