Annual report pursuant to Section 13 and 15(d)

Schedule I - Parent Company Financial Statement (Statements Of Condensed Unconsolidated Cash Flows) (Detail)

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Schedule I - Parent Company Financial Statement (Statements Of Condensed Unconsolidated Cash Flows) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES      
Net Loss $ (26,550) $ (158,656) $ (77,550)
Adjustments to reconcile net income to net cash provided by      
Depreciation, depletion and amortization 6,926 32,998 20,074
Deferred tax asset   1,349  
Stock-based compensation 192 3,810 3,321
Change in operating assets and liabilities:      
Other receivables (18) (609) (1,230)
Prepayments and other 392 3,037 (3,957)
Accounts payable (15,459) 30,187 (8,999)
Accrued liabilities and other (4,586) 3,034 (874)
Net cash provided by (used in) continuing operating activities (15,738) 41,534 31,992
CASH FLOWS FROM INVESTING ACTIVITIES      
Decrease in restricted cash 15,219 5,536 (9,218)
Net cash used in continuing investing activities (1,287) (62,133) (98,711)
CASH FLOWS FROM FINANCING ACTIVITIES      
Proceeds from the issuances of common stock   441 5,685
Purchases of treasury stock (51)   (1,868)
Net cash provided by (used in) continuing financing activities (144) 441 16,530
NET CHANGE IN CASH AND CASH EQUIVALENTS (4,883) (43,694) (61,478)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR 25,357 69,051 130,529
CASH AND CASH EQUIVALENTS AT END OF YEAR 20,474 25,357 69,051
VAALCO ENERGY, INC.      
CASH FLOWS FROM OPERATING ACTIVITIES      
Net Loss (26,550) (158,656) (77,550)
Adjustments to reconcile net income to net cash provided by      
Depreciation, depletion and amortization 244 240 94
Deferred tax asset   1,349  
Stock-based compensation 192 3,810 3,322
Equity in (earnings) loss from subsidiaries 16,732 146,495 71,199
Change in operating assets and liabilities:      
Other receivables (21) 293 (257)
Prepayments and other (955) (236) (416)
Accounts payable (658) 753 (34)
Accrued liabilities and other (1,855) 517 187
Net cash provided by (used in) continuing operating activities (12,871) (5,435) (3,455)
CASH FLOWS FROM INVESTING ACTIVITIES      
Investment in subsidiaries   (7,044) (4,371)
Return of investment in subsidiaries 12,556    
Decrease in restricted cash 1,582 8,418  
Property and equipment expenditures (178) (160) (816)
Net cash used in continuing investing activities 13,960 1,214 (5,187)
CASH FLOWS FROM FINANCING ACTIVITIES      
Proceeds from the issuances of common stock   441 5,685
Purchases of treasury stock (51)   (1,868)
Net cash provided by (used in) continuing financing activities (51) 441 3,817
NET CHANGE IN CASH AND CASH EQUIVALENTS 1,038 (3,780) (4,825)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR   $ 3,780 8,605
CASH AND CASH EQUIVALENTS AT END OF YEAR $ 1,038   $ 3,780