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Net Income per Share - Summary of Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Numerator:        
Net income attributable to Vicor Corporation $ 49,772 $ 41,192 $ 70,436 $ 43,731
Denominator:        
Denominator for basic net income per share - weighted average shares [1] 45,936 45,007 45,703 45,112
Effect of dilutive securities:        
Employee stock options [2] 1,772 70 1,778 174
Denominator for diluted net income per share - adjusted weighted-average shares and assumed conversions 47,708 45,077 47,481 45,286
Basic net income per share $ 1.08 $ 0.92 $ 1.54 $ 0.97
Diluted net income per share $ 1.04 $ 0.91 $ 1.48 $ 0.97
[1] Denominator represents the weighted average number of shares of Common Stock and Class B Common Stock outstanding.
[2] Options to purchase 97,985 and 62,447 shares of Common Stock for the three and six months ended June 30, 2026, respectively, were not included in the calculation of net income per share as the effect would have been antidilutive. Options to purchase 2,170,585 and 1,353,021 shares of Common Stock for each of the three and six months ended June 30, 2025, respectively, were not included in the calculation of net income per share as the effect would have been antidilutive.