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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 |  |

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- Definition The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 + Details
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