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Stock Based Compensation
 6 Months Ended
Jun. 30, 2011
Stock Based Compensation [Abstract]  
Stock Based Compensation
4.Stock Based Compensation
     The Company uses the Black-Scholes option pricing model to calculate the fair value of stock option awards as of their grant date. Stock-based compensation expense for the three and six months ended June 30 was as follows (in thousands):
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
Cost of revenues
  $ 18     $ 2     $ 35     $ 6  
Selling, general and administrative
    295       121       525       206  
Research and development
    142       50       279       86  
 
                       
Total stock based compensation
  $ 455     $ 173     $ 839     $ 298  
 
                       
     During the third quarter of 2010, the Company granted 1,243,750 non-qualified stock options under the Vicor Corporation Amended and Restated 2000 Stock Option and Incentive Plan (the “2000 Plan”), with performance-based vesting provisions tied to achievement of certain quarterly revenue targets by the Brick Business Unit. Under the accounting rules for performance-based awards, the Company is required to assess, on an ongoing basis, the probability of whether the performance criteria will be achieved. If and when achievement is deemed probable, the Company will begin to recognize the associated compensation expense for the stock options over the relevant performance period. As of June 30, 2011, the Company determined that it was not probable the revenue targets could be achieved and, accordingly, has not recorded any compensation expense relating to these options since the grant date. The unrecognized compensation expense of these performance-based options was approximately $7,790,000 as of June 30, 2011.
     On December 31, 2010, the Company granted 2,984,250 non-qualified stock options under the 2007 V*I Chip Plan with performance-based vesting provisions tied to achievement of certain margin targets by the V*I Chip subsidiary. As of December 31, 2010, the Company determined it was probable the margin targets could be achieved and, accordingly, began recording compensation expense relating to these options beginning January 1, 2011. The unrecognized compensation expense of these performance-based options was approximately $1,338,000 as of June 30, 2011.