Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015
OPERATING ACTIVITIES:
Net loss	$ (29,695)	$ (19,558)
Adjustments to reconcile net loss to cash provided by operating activities:
Depletion, depreciation and amortization	40,220	54,924
Amortization of debt issuance costs	718	787
Write-off of debt issuance costs	563
Unrealized loss on commodity derivatives	9,033	23,225
Exploration expense	2,093	1,486
Share-based compensation expense	2,924	4,292
Deferred income tax benefit	(15,932)	(11,365)
Other non-cash items	(105)	(38)
Changes in operating assets and liabilities:
Accounts receivable	3,882	2,410
Prepaid expenses and other current assets	(266)	(288)
Accounts payable	(3,871)	(3,423)
Oil, NGL and gas sales payable	(49)	(3,699)
Accrued liabilities	(923)	1,348
Cash provided by operating activities	8,592	50,101
INVESTING ACTIVITIES:
Additions to oil and gas properties	(11,745)	(131,414)
Additions to furniture, fixtures and equipment, net	(15)	(53)
Change in working capital related to investing activities	2,397	(25,214)
Cash used in investing activities	(9,363)	(156,681)
FINANCING ACTIVITIES:
Borrowings under credit facility	33,600	182,500
Repayment of amounts outstanding under credit facility	(31,600)	(75,500)
Tax withholdings related to restricted stock	(14)	(100)
Debt issuance costs	(191)
Change in working capital related to financing activities	(731)
Cash provided by financing activities	1,064	106,900
CHANGE IN CASH AND CASH EQUIVALENTS	293	320
CASH AND CASH EQUIVALENTS, beginning of period	600	432
CASH AND CASH EQUIVALENTS, end of period	893	752
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	12,500	11,424
SUPPLEMENTAL DISCLOSURE OF NON-CASH TRANSACTION:
Asset retirement obligations capitalized	$ 28	$ 116

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.