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Net Income (Loss) per Share - Summary of Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Numerator:        
Net income (loss) attributable to Vicor Corporation $ 28,292 $ 11,552 $ 72,023 $ (4,117)
Denominator:        
Denominator for basic net income (loss) per share - weighted average shares [1] 44,734 45,117 44,986 44,829
Effect of dilutive securities:        
Employee stock options [2] 196 57 181  
Denominator for diluted net income (loss) per share - adjusted weighted-average shares and assumed conversions 44,930 45,174 45,167 44,829
Basic net income (loss) per share $ 0.63 $ 0.26 $ 1.6 $ (0.09)
Diluted net income (loss) per share $ 0.63 $ 0.26 $ 1.59 $ (0.09)
[1] Denominator represents the weighted average number of shares of Common Stock and Class B Common Stock outstanding.
[2] Options to purchase 1,733,948 and 1,500,723 shares of Common Stock for the three and nine months ended September 30, 2025, respectively, were not included in the calculation of net income per share as the effect would have been antidilutive. Options to purchase 2,875,975 and 2,971,033 shares of Common Stock for each of the three and nine months ended September 30, 2024, respectively, were not included in the calculation of net income (loss) per share as the effect would have been antidilutive.