Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Consolidated net income		$ 4,306	$ 3,982
Foreign currency translation (losses) gains, net of tax	[1]	(66)	242
Unrealized gains on available-for-sale securities, net of tax	[1]	19	21
Other comprehensive (loss) income		(47)	263
Consolidated comprehensive income		4,259	4,245
Less: Comprehensive income attributable to noncontrolling interest		15	58
Comprehensive income attributable to Vicor Corporation		$ 4,244	$ 4,187

[1] The deferred tax assets associated with cumulative foreign currency translation gains and cumulative unrealized gains on available-for-sale securities are completely offset by a tax valuation allowance as of March 31, 2019 and 2018. Therefore, there is no income tax benefit (provision) recognized for the three and three months ended March 31, 2019 and 2018.