Significant Accounting Policies - Computation Of Basic And Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Numerator:
Net income attributable to Vicor Corporation		$ 118,556	$ 6,129	$ 53,595
Denominator:
Denominator for basic net income per share- weighted average shares	[1]	45,040	44,912	44,320
Effect of dilutive securities:
Employee stock options	[2]	410	256	684
Denominator for diluted net income per share- adjusted weighted-average shares and assumed conversions	[3]	45,450	45,168	45,004
Basic net income per share		$ 2.63	$ 0.14	$ 1.21
Diluted net income per share		$ 2.61	$ 0.14	$ 1.19

[1] Denominator represents weighted average number of Common Shares and Class B Common Shares outstanding

[2] Options to purchase 1,326,053, 2,504,068 and 1,557,927 shares of Common Stock in 2025, 2024, and 2023, respectively, were not included in the calculation of net income per share as the effect would have been antidilutive.

[3] Denominator represents weighted average number of Common Shares and Class B Common Shares outstanding for the year, adjusted to include the dilutive effect, if any, of outstanding options.