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		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator:
Net income (loss) attributable to Vicor Corporation		$ 41,192	$ (1,196)	$ 43,731	$ (15,669)
Denominator:
Denominator for basic net income (loss) per share - weighted average shares	[1]	45,007	44,855	45,112	44,686
Effect of dilutive securities:
Employee stock options	[2]	70		174
Denominator for diluted net income (loss) per share - adjusted weighted-average shares and assumed conversions		45,077	44,855	45,286	44,686
Basic net income (loss) per share		$ 0.92	$ (0.03)	$ 0.97	$ (0.35)
Diluted net income (loss) per share		$ 0.91	$ (0.03)	$ 0.97	$ (0.35)

[1] Denominator represents the weighted average number of shares of Common Stock and Class B Common Stock outstanding.

[2] Options to purchase 2,170,585 and 1,353,021 shares of Common Stock for 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. Options to purchase 3,083,375 shares of Common Stock for each of the three and six months ended June 30, 2024 were not included in the calculation of net loss per share as the effect would have been antidilutive.