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v3.3.1.900

Statements Of Consolidated Operations - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Revenues: |  |  |
Oil and natural gas sales | $ 80,445 | $ 127,691 | $ 169,277
Operating costs and expenses: |  |  |
Production expense | 40,096 | 31,718 | 36,615
Exploration expense | 46,453 | 15,358 | 23,928
Depreciation, depletion and amortization | 33,010 | 20,086 | 16,929
General and administrative expense | 14,829 | 14,194 | 11,254
Impairment of proved properties | 81,322 | 98,341 |
General and administrative related to shareholder matters | 2,372 |  |
Bad debt expense and other | 2,968 | 2,400 | 3,326
Total operating costs and expenses | 221,050 | 182,097 | 92,052
Other operating loss, net | (2,948) |  |
Operating income (loss) | (143,553) | (54,406) | 77,225
Other income (expense): |  |  |
Interest income | 12 | 75 | 73
Interest expense | (1,337) |  |
Other, net | 809 | (733) | (111)
Total other income (expense) | (516) | (658) | (38)
Income (loss) before income taxes | (144,069) | (55,064) | 77,187
Income tax expense | 14,587 | 22,486 | 34,115
Net income (loss) | $ (158,656) | $ (77,550) | $ 43,072
Basic net income (loss) per share | $ (2.72) | $ (1.36) | $ 0.75
Diluted net income (loss) per share | $ (2.72) | $ (1.36) | $ 0.74
Basic weighted average shares outstanding | 58,288,740 | 57,229,435 | 57,298,910
Diluted weighted average shares outstanding | 58,288,740 | 57,229,435 | 57,925,001

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 25 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=56951519&loc=d3e64954-109465 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(a)(15)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 + Details
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