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Consolidated Statements of Equity (USD $) In Thousands, unless otherwise specified | Total | Additional Paid-In Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Treasury Stock [Member] | Total Vicor Corporation Stockholders' Equity [Member] | Noncontrolling Interest [Member] | Class B Common Stock [Member] | Common Stock [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2010 | $ 179,012 | $ 163,933 | $ 133,791 | $ (1,369) | $ (121,827) | $ 175,031 | $ 3,981 | $ 118 | $ 385
Sales of Common Stock | 493 | 491 |  |  |  | 493 |  |  | 2
Common Stock dividends paid | (6,272) |  | (6,272) |  |  | (6,272) |  |  |
Noncontrolling interest dividends paid | (690) |  |  |  |  |  | (690) |  |
Excess tax benefit of stock-based compensation | 133 | 133 |  |  |  | 133 |  |  |
Stock-based compensation expense | 1,567 | 1,567 |  |  |  | 1,567 |  |  |
Liability stock option awards reclassified to equity | 103 | 103 |  |  |  | 103 |  |  |
Components of comprehensive income, net of tax |  |  |  |  |  |  |  |  |
Net income (loss) | 9,309 |  | 8,843 |  |  | 8,843 | 466 |  |
Other comprehensive income | 1,055 |  |  | 1,047 |  | 1,047 | 8 |  |
Consolidated comprehensive income (loss) | 10,364 |  |  |  |  | 9,890 | 474 |  |
Ending Balance at Dec. 31, 2011 | 184,710 | 166,227 | 136,362 | (322) | (121,827) | 180,945 | 3,765 | 118 | 387
Sales of Common Stock | 12 | 9 |  |  |  | 12 |  |  | 3
Noncontrolling interest dividends paid | (378) |  |  |  |  |  | (378) |  |
Excess tax benefit of stock-based compensation | 105 | 105 |  |  |  | 105 |  |  |
Stock-based compensation expense | 1,244 | 1,244 |  |  |  | 1,244 |  |  |
Net settlement stock option exercises | (87) | (87) |  |  |  | (87) |  |  |
Components of comprehensive income, net of tax |  |  |  |  |  |  |  |  |
Net income (loss) | (3,798) |  | (4,077) |  |  | (4,077) | 279 |  |
Other comprehensive income | 165 |  |  | 210 |  | 210 | (45) |  |
Consolidated comprehensive income (loss) | (3,633) |  |  |  |  | (3,867) | 234 |  |
Ending Balance at Dec. 31, 2012 | 181,973 | 167,498 | 132,285 | (112) | (121,827) | 178,352 | 3,621 | 118 | 390
Sales of Common Stock | 27 | 25 |  |  |  | 27 |  |  | 2
Noncontrolling interest dividends paid | (531) |  |  |  |  |  | (531) |  |
Reversal of excess tax benefit of stock-based compensation | (451) | (451) |  |  |  | (451) |  |  |
Stock-based compensation expense | 2,450 | 2,450 |  |  |  | 2,450 |  |  |
Net settlement stock option exercises | (48) | (48) |  |  |  | (48) |  |  |
Purchase of treasury stock | (17,100) |  |  |  | (17,100) | (17,100) |  |  |
Components of comprehensive income, net of tax |  |  |  |  |  |  |  |  |
Net income (loss) | (23,504) |  | (23,640) |  |  | (23,640) | 136 |  |
Other comprehensive income | (479) |  |  | (414) |  | (414) | (65) |  |
Consolidated comprehensive income (loss) | (23,983) |  |  |  |  | (24,054) | 71 |  |
Ending Balance at Dec. 31, 2013 | $ 142,337 | $ 169,474 | $ 108,645 | $ (526) | $ (138,927) | $ 139,176 | $ 3,161 | $ 118 | $ 392

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