CONDENSED CONSOLIDATED BALANCE SHEET - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 277,842,000	$ 263,495,000
Restricted cash	0	18,742,000
Accounts receivable	36,378,000	39,258,000
Fair value of derivative contracts	417,000	879,000
Current income tax receivable	16,212,000	36,260,000
Other current assets	6,901,000	7,138,000
Total current assets	337,750,000	365,772,000
Oil and gas properties, full cost method of accounting:
Proved	713,304,000	713,157,000
Less: accumulated depreciation, depletion and amortization	(374,063,000)	(353,462,000)
Net proved oil and gas properties	339,241,000	359,695,000
Unevaluated	118,365,000	102,187,000
Other property and equipment, net	16,544,000	17,275,000
Other assets, net	14,066,000	13,844,000
Total assets	825,966,000	858,773,000
Current liabilities:
Accounts payable to vendors	20,088,000	54,226,000
Undistributed oil and gas proceeds	4,283,000	5,142,000
Accrued interest	6,038,000	1,685,000
Fair value of derivative contracts	13,147,000	8,969,000
Asset retirement obligations	56,428,000	79,300,000
Current portion of long-term debt	430,000	425,000
Other current liabilities	13,552,000	22,579,000
Total current liabilities	113,966,000	172,326,000
Long-term debt	235,394,000	235,502,000
Asset retirement obligations	140,226,000	133,801,000
Fair value of derivative contracts	4,564,000	3,085,000
Other long-term liabilities	5,743,000	5,891,000
Total liabilities	499,893,000	550,605,000
Commitments and contingencies
Stockholders’ equity:
Common stock ($.01 par value; authorized 60,000,000 shares; issued 19,998,701 and 19,998,019 shares, respectively)	200,000	200,000
Additional paid-in capital	555,940,000	555,607,000
Accumulated deficit	(230,067,000)	(247,639,000)
Total stockholders’ equity	326,073,000	308,168,000
Total liabilities and stockholders’ equity	$ 825,966,000	$ 858,773,000

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.