Annual report pursuant to Section 13 and 15(d)

Schedule I - Parent Company Financial Statement (Condensed Unconsolidated Balance Sheets) (Details)

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Schedule I - Parent Company Financial Statement (Condensed Unconsolidated Balance Sheets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current assets:        
Cash and cash equivalents $ 20,474 $ 25,357 $ 69,051 $ 130,529
Receivables:        
Other 120 42    
Prepayments and other 3,956 2,975    
Total current assets 38,475 63,742    
Property and equipment - successful efforts method:        
Equipment and other 9,779 10,805    
Property, plant and equipment, gross, Total 409,010 433,398    
Accumulated depreciation, depletion, and amortization (380,991) (400,041)    
Net property and equipment 28,019 33,357    
Other noncurrent assets:        
Restricted cash 918 15,830    
Total assets 81,032 123,958    
Current liabilities:        
Accounts payable 19,096 44,140    
Accrued liabilities and other 10,506 18,447    
Total current liabilities 55,554 66,716    
Total liabilities 81,390 97,882    
Commitments and contingencies    
VAALCO Energy Inc. shareholders’ equity (deficit):        
Preferred stock, none issued, 500,000 shares authorized, $25 par value    
Common stock, 66,109,565 and 66,041,338 shares issued, $0.10 par value, 100,000,000 shares authorized 6,611 6,604    
Additional paid-in capital 70,268 69,118    
Less treasury stock, 7,555,095 and7,514,169 shares at cost (37,933) (37,882)    
Accumulated deficit (39,304) (11,764)    
Total shareholders' equity (deficit) (358) 26,076 180,463 250,874
Total liabilities and shareholders' equity (deficit) 81,032 123,958    
VAALCO ENERGY, INC.        
Current assets:        
Cash and cash equivalents 1,038   $ 3,780 $ 8,605
Receivables:        
Other 21      
Prepayments and other 1,696 741    
Total current assets 2,755 741    
Property and equipment - successful efforts method:        
Equipment and other 1,225 1,222    
Property, plant and equipment, gross, Total 1,225 1,222    
Accumulated depreciation, depletion, and amortization (497) (428)    
Net property and equipment 728 794    
Other noncurrent assets:        
Restricted cash   1,582    
Investment in Subsidiaries   26,781    
Total assets 3,483 29,898    
Current liabilities:        
Accounts payable 310 968    
Accrued liabilities and other 1,024 2,854    
Total current liabilities 1,334 3,822    
Losses in excess of investment in subsidiaries 2,507      
Total liabilities 3,841 3,822    
Commitments and contingencies    
VAALCO Energy Inc. shareholders’ equity (deficit):        
Preferred stock, none issued, 500,000 shares authorized, $25 par value    
Common stock, 66,109,565 and 66,041,338 shares issued, $0.10 par value, 100,000,000 shares authorized 6,611 6,604    
Additional paid-in capital 70,268 69,118    
Less treasury stock, 7,555,095 and7,514,169 shares at cost (37,933) (37,882)    
Accumulated deficit (39,304) (11,764)    
Total shareholders' equity (deficit) (358) 26,076    
Total liabilities and shareholders' equity (deficit) $ 3,483 $ 29,898