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Consolidated Statements of Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
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]
Beginning Balance at Dec. 31, 2012 $ 181,973 $ 390 $ 167,498 $ 132,285 $ (112) $ (121,827) $ 178,352 $ 3,621 $ 118
Sales of Common Stock 27 2 25       27    
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)    
Net income (loss) (23,504)     (23,640)     (23,640) 136  
Other comprehensive loss (479)       (414)   (414) (65)  
Components of comprehensive income, net of tax                  
Net income (loss) (23,504)     (23,640)     (23,640) 136  
Other comprehensive income (loss) (479)       (414)   (414) (65)  
Total comprehensive income (loss) (23,983)           (24,054) 71  
Total comprehensive income (loss) (23,983)           (24,054) 71  
Ending Balance at Dec. 31, 2013 142,337 392 169,474 108,645 (526) (138,927) 139,176 3,161 118
Sales of Common Stock 788 1 787       788    
Noncontrolling interest dividends paid (162)             (162)  
Stock-based compensation expense 1,634   1,634       1,634    
Other 6   6       6    
Net income (loss) (14,070)     (13,887)     (13,887) (183)  
Other comprehensive loss 19       55   55 (36)  
Components of comprehensive income, net of tax                  
Net income (loss) (14,070)     (13,887)     (13,887) (183)  
Other comprehensive income (loss) 19       55   55 (36)  
Total comprehensive income (loss) (14,051)           (13,832) (219)  
Total comprehensive income (loss) (14,051)           (13,832) (219)  
Ending Balance at Dec. 31, 2014 130,552 393 171,901 94,758 (471) (138,927) 127,772 2,780 118
Disposition of consolidated subsidiary (1,742)   (5)       (5) (1,737)  
Sales of Common Stock 820 2 818       820    
Acquisition of noncontrolling interest (360)   (144)       (144) (216)  
Stock-based compensation expense 1,782   1,782       1,782    
Other 7   7       7    
Net settlement stock option exercises (22)   (22)       (22)    
Net income (loss) 5,159     4,927     4,927 232  
Other comprehensive loss (111)       (106)   (106) (5)  
Components of comprehensive income, net of tax                  
Net income (loss) 5,159     4,927     4,927 232  
Other comprehensive income (loss) (111)       (106)   (106) (5)  
Total comprehensive income (loss) 5,048           4,821 227  
Total comprehensive income (loss) 5,048           4,821 227  
Ending Balance at Dec. 31, 2015 $ 136,085 $ 395 $ 174,337 $ 99,685 $ (577) $ (138,927) $ 135,031 $ 1,054 $ 118