Net Income 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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net income attributable to Vicor Corporation		$ 16,582	$ 1,792	$ 44,927	$ 17,384
Denominator:
Denominator for basic net income per share-weighted average shares	[1]	44,433	44,031	44,275	43,986
Effect of dilutive securities:
Employee stock options	[2]	754	867	725	920
Denominator for diluted net income per share - adjusted weighted-average shares and assumed conversions		45,187	44,898	45,000	44,906
Basic net income per share		$ 0.37	$ 0.04	$ 1.01	$ 0.4
Diluted net income per share		$ 0.37	$ 0.04	$ 1	$ 0.39

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

[2] Options to purchase 1,012,045 and 1,473,749 shares of Common Stock for the three and nine months ended September 30, 2023, respectively, and options to purchase 1,037,640 and 772,240 shares of Common Stock for the three and nine months ended September 30, 2022, respectively, were not included in the calculations of net income per share as the effect would have been antidilutive.