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Schedule I - Parent Company Financial Statement (Statements Of Consolidated Cash Flows) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ (80,779) | $ (33,668) | $ (5,204) | $ (39,005) | $ (98,332) | $ 3,109 | $ 24,711 | $ (7,038) | $ (158,656) | $ (77,550) | $ 43,072
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 33,010 | 20,086 | 16,929
Deferred tax asset |  |  |  |  |  |  |  |  | 1,349 |  |
Stock based compensation |  |  |  |  |  |  |  |  | 3,810 | 3,322 | 3,005
Change in operating assets and liabilities: |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  |  |  |  |  |  |  | (584) | (1,250) | (53)
Prepayments and other |  |  |  |  |  |  |  |  | 3,114 | (4,172) | 594
Accounts payable |  |  |  |  |  |  |  |  | 28,926 | (8,907) | 7,106
Accrued liabilities and other |  |  |  |  |  |  |  |  | 3,089 | (596) | 1,881
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 38,875 | 23,390 | 75,400
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Decrease in restricted cash |  |  |  |  |  |  |  |  | 5,536 | (9,219) | (1,065)
Net cash used in investing activities |  |  |  |  |  |  |  |  | (83,010) | (101,398) | (67,944)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issuances of common stock |  |  |  |  |  |  |  |  | 441 | 5,685 | 3,729
Purchases of treasury stock |  |  |  |  |  |  |  |  |  | (1,868) | (11,456)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  | 441 | 16,530 | (7,727)
NET CHANGE IN CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  | (43,694) | (61,478) | (271)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD |  |  |  | 69,051 |  |  |  | 130,529 | 69,051 | 130,529 | 130,800
CASH AND CASH EQUIVALENTS AT END OF PERIOD | $ 25,357 |  |  |  | 69,051 |  |  |  | 25,357 | 69,051 | 130,529
VAALCO ENERGY, INC. |  |  |  |  |  |  |  |  |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | (158,656) | (77,550) | 43,072
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 240 | 94 | 63
Deferred tax asset |  |  |  |  |  |  |  |  | 1,349 |  |
Stock based compensation |  |  |  |  |  |  |  |  | 3,810 | 3,322 | 3,005
Equity in (earnings) loss from subsidiaries |  |  |  |  |  |  |  |  | 146,495 | 71,199 | (48,852)
Change in operating assets and liabilities: |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  |  |  |  |  |  |  | 293 | (257) | 180
Prepayments and other |  |  |  |  |  |  |  |  | (236) | (416) | (16)
Accounts payable |  |  |  |  |  |  |  |  | 753 | (34) | 213
Accrued liabilities and other |  |  |  |  |  |  |  |  | 517 | 187 | 158
Net cash provided by operating activities |  |  |  |  |  |  |  |  | (5,435) | (3,455) | (2,177)
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Investment in subsidiaries |  |  |  |  |  |  |  |  | (7,044) | (4,371) | (8,245)
Decrease in restricted cash |  |  |  |  |  |  |  |  | 8,418 |  |
Property and equipment expenditures |  |  |  |  |  |  |  |  | (160) | (816) | (47)
Net cash used in investing activities |  |  |  |  |  |  |  |  | 1,214 | (5,187) | (8,292)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issuances of common stock |  |  |  |  |  |  |  |  | 441 | 5,685 | 3,729
Purchases of treasury stock |  |  |  |  |  |  |  |  |  | (1,868) | (11,456)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  | 441 | 3,817 | (7,727)
NET CHANGE IN CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  | (3,780) | (4,825) | (18,196)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD |  |  |  | $ 3,780 |  |  |  | $ 8,605 | $ 3,780 | 8,605 | 26,801
CASH AND CASH EQUIVALENTS AT END OF PERIOD |  |  |  |  | $ 3,780 |  |  |  |  | $ 3,780 | $ 8,605

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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