Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net revenues		$ 70,761	$ 63,355	$ 134,162	$ 129,080
Cost of revenues		40,443	34,238	76,513	68,877
Gross margin		30,318	29,117	57,649	60,203
Operating expenses:
Selling, general and administrative		15,455	15,030	31,824	30,403
Research and development		12,830	11,706	26,165	22,926
Total operating expenses		28,285	26,736	57,989	53,329
Income (loss) from operations		2,033	2,381	(340)	6,874
Other income (expense), net:
Total unrealized (losses) gains on available-for-sale securities, net		(2)	19	45	39
Less: portion of losses (gains) recognized in other comprehensive income		3	(18)	(43)	(37)
Net credit gains recognized in earnings		1	1	2	2
Other income (expense), net		232	287	379	525
Total other income (expense), net		233	288	381	527
Income before income taxes		2,266	2,669	41	7,401
Less: (Benefit) provision for income taxes		(406)	113	(900)	539
Consolidated net income		2,672	2,556	941	6,862
Less: Net income (loss) attributable to noncontrolling interest		5	(7)	9	13
Net income attributable to Vicor Corporation		$ 2,667	$ 2,563	$ 932	$ 6,849
Net income per common share attributable to Vicor Corporation:
Basic		$ 0.06	$ 0.06	$ 0.02	$ 0.17
Diluted		$ 0.06	$ 0.06	$ 0.02	$ 0.17
Shares used to compute net income per common share attributable to Vicor Corporation:
Basic	[1]	41,643	40,275	41,140	40,252
Diluted		43,385	41,081	42,980	41,055

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