Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows provided by (used in) operating activities:
Net loss	$ (6,637)	$ (90,896)	$ (294,790)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Deferred tax (benefit) expense	(949)	543	2,626
Depreciation, depletion and amortization	32,053	28,720	63,497
Ceiling test write-down	0	40,304	266,562
Accretion of asset retirement obligation	2,252	2,515	3,259
Share based compensation expense	1,447	1,444	4,617
Gain on sale of assets	0	0	(21,937)
Amortization costs and other	554	2,106	2,259
Non-cash PIK interest	22,895	5,722	0
Payments to settle asset retirement obligations	(3,364)	(3,169)	(2,776)
Costs incurred to issue 2021 Notes and 2021 PIK Notes	0	10,139	0
Gain on extinguishment of debt	(403)	0	0
Changes in working capital accounts:
Revenue receivable	(5,046)	(3,818)	10,009
Joint interest billing receivable	610	41,400	223
Accounts payable and accrued liabilities	2,970	(72,760)	(9,400)
Advances from co-owners	(600)	(13,788)	3,299
Other	(1,629)	(5,060)	2,657
Net cash provided by (used in) operating activities	44,153	(56,598)	30,105
Cash flows (used in) provided by investing activities:
Investment in oil and gas properties	(64,613)	(30,366)	(90,218)
Investment in other property and equipment	(54)	(24)	(454)
Sale of oil and gas properties	10,707	25,482	271,769
Net cash (used in) provided by investing activities	(53,960)	(4,908)	181,097
Cash flows used in financing activities:
Net payments for share based compensation	(26)	11	(199)
Deferred financing costs	(174)	(3,156)	(1,094)
Payment of preferred stock dividend	0	(1,285)	(5,139)
Proceeds from borrowings	20,000	10,000	70,000
Repayment of borrowings	0	0	(145,000)
Redemption of 2017 Notes	(22,650)	(53,626)	0
Costs incurred to issue 2021 Notes and 2021 PIK Notes	0	(10,139)	0
Net cash used in financing activities	(2,850)	(58,195)	(81,432)
Net (decrease) increase in cash and cash equivalents	(12,657)	(119,701)	129,770
Cash and cash equivalents, beginning of period	28,312	148,013	18,243
Cash and cash equivalents, end of period	15,655	28,312	148,013
Cash paid (received) during the period for:
Interest	7,432	33,206	36,217
Income taxes	$ (94)	$ (18)	$ 0

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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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The cash outflow for a borrowing supported by a written promise to pay an obligation.

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- Definition

Accretion expense of asset retirement obligations related to oil and gas producing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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