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Stock-Based Compensation - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended 6 Months Ended
Jun. 17, 2013
Participant
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2010
Sep. 30, 2010
Jun. 21, 2013
Two Thousand Plan [Member]
May 14, 2013
Two Thousand Plan [Member]
Jun. 30, 2013
Two Thousand Plan [Member]
Jun. 30, 2013
Two Thousand Plan [Member]
Employees and Directors [Member]
Age
Jun. 30, 2013
Performance Based Options [Member]
Jun. 30, 2013
Vi Chip 2007 Stock Option and Incentive Plan with Performance-Based Vesting Provisions [Member]
Jun. 30, 2013
Vicor Corporation Amended and Restated 2000 Stock Option and Incentive Plan, with Performance-Based Vesting Provisions [Member]
Jun. 30, 2013
Tranches One [Member]
Performance Based Options [Member]
Jun. 30, 2013
Tranches One [Member]
Time Based Option [Member]
Jun. 30, 2013
Tranches Two [Member]
Performance Based Options [Member]
Jun. 30, 2013
Tranches Three [Member]
Performance Based Options [Member]
Jun. 30, 2013
Tranche Four [Member]
Performance Based Options [Member]
Jun. 30, 2013
Tranche Five [Member]
Performance Based Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Eligible participants 638                                      
Options to purchase shares of Common Stock       1,531,077                                
Percentage of common stock 91.00%                                      
Replacement option vesting period       5 years                                
Replacement option expiration period       10 years                                
Time-Based eligible Option exercise price                       $ 6.29                
Common stock exercise price percentage                             120.00% 120.00% 140.00% 160.00% 180.00% 200.00%
Common stock sales price                             $ 6.29   $ 7.34 $ 8.38 $ 9.43 $ 10.48
Incremental expenses       $ 365,000           $ 208,000 $ 625,000                  
Unrecognized compensation expense of these performance-based options   318,000   318,000                 813,000 417,000            
Aggregate expenses   1,139,000 352,000 1,402,000 670,000             2,300,000                
Age of employees                     62.5                  
Immediate expense recognition                   $ 190,000 $ 450,000                  
Exercise price of options awarded               $ 5.67 $ 5.35                      
Common stock options awarded               70,552 150,000                      
Non-qualified stock options           2,984,250 1,243,750         66,500