Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES:
Net loss	$ (13,660)	$ (7,708)
Adjustments to reconcile net loss to cash provided by operating activities:
Depletion, depreciation and amortization	20,229	26,520
Amortization of debt issuance costs	372	393
Unrealized loss on commodity derivatives	957	9,321
Exploration expense	505	592
Share-based compensation expense	1,550	2,217
Deferred income tax benefit	(7,245)	(3,996)
Other non-cash items	(104)	26
Changes in operating assets and liabilities:
Accounts receivable	4,390	2,219
Prepaid expenses and other current assets	(348)	(625)
Accounts payable	535	1,697
Oil, NGL and gas sales payable	(1,034)	(3,705)
Accrued liabilities	(856)	228
Cash provided by operating activities	5,291	27,179
INVESTING ACTIVITIES:
Additions to oil and gas properties	(4,874)	(74,540)
Additions to furniture, fixtures and equipment, net	(3)	(52)
Change in working capital related to investing activities	1,563	(12,690)
Cash used in investing activities	(3,314)	(87,282)
FINANCING ACTIVITIES:
Borrowings under credit facility	12,600	99,500
Repayment of amounts outstanding under credit facility	(13,600)	(39,500)
Tax withholdings related to restricted stock	(6)	(35)
Change in working capital related to financing activities	(731)
Cash (used in) provided by financing activities	(1,737)	59,965
CHANGE IN CASH AND CASH EQUIVALENTS	240	(138)
CASH AND CASH EQUIVALENTS, beginning of period	600	432
CASH AND CASH EQUIVALENTS, end of period	840	294
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	1,873	1,177
SUPPLEMENTAL DISCLOSURE OF NON-CASH TRANSACTION:
Asset retirement obligations capitalized	$ 28	$ 62

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.