Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
OPERATING ACTIVITIES:
Net loss	$ (16,518)	$ (149,664)
Adjustments to reconcile net loss to cash provided by operating activities:
Depletion, depreciation and amortization	32,529	37,505
Amortization of debt issuance costs	525	429
Gain on debt extinguishment		(5,053)
Commodity derivative loss (gain)	6,812	(4,675)
Settlements of commodity derivatives	(3,513)	(958)
Exploration expense		3,105
Share-based compensation expense	1,484	2,188
Deferred income tax (benefit) provision	(3,832)	134,191
Other non-cash items	12	(3)
Changes in operating assets and liabilities:
Accounts receivable	(1,123)	1,126
Prepaid expenses and other current assets	(811)	(519)
Accounts payable	(4,047)	(4,258)
Oil, NGLs and gas sales payable	620	382
Accrued liabilities	2,112	2,424
Cash provided by operating activities	14,250	16,220
INVESTING ACTIVITIES:
Additions to oil and gas properties	(27,142)	(37,819)
Additions to furniture, fixtures and equipment, net	(31)	(14)
Change in working capital related to investing activities	7,710	9,308
Cash used in investing activities	(19,463)	(28,525)
FINANCING ACTIVITIES:
Borrowings under credit facility	60,850	54,250
Repayment of amounts outstanding under credit facility	(54,350)	(40,250)
Equity issuance costs		(2,762)
Tax withholdings related to restricted stock	(632)	(117)
Debt issuance costs	(14)
Change in working capital related to financing activities	(640)	1,341
Cash provided by financing activities	5,214	12,462
CHANGE IN CASH AND CASH EQUIVALENTS	1	157
CASH AND CASH EQUIVALENTS, beginning of period	21	21
CASH AND CASH EQUIVALENTS, end of period	22	178
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	11,619	10,410
SUPPLEMENTAL DISCLOSURE OF NON-CASH TRANSACTION:
Asset retirement obligations capitalized	$ 2	$ 31

Non-cash exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells.

No definition available.