Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total Vicor Corporation Stockholders' Equity [Member]	Noncontrolling Interest [Member]	Class B Common Stock [Member] Common Stock [Member]
Beginning Balance at Dec. 31, 2018	$ 184,090	$ 402	$ 193,457	$ 129,000	$ (394)	$ (138,927)	$ 183,656	$ 434	$ 118
Issuance of Common Stock under employee stock plans	4,742	3	4,739				4,742
Stock-based compensation expense	3,036		3,036				3,036
Noncontrolling interest dividend paid	(139)							(139)
Other	19		19				19
Components of comprehensive income, net of tax
Net income	14,109			14,098			14,098	11
Other comprehensive income	13				11		11	2
Total comprehensive income	14,122						14,109	13
Ending Balance at Dec. 31, 2019	205,870	405	201,251	143,098	(383)	(138,927)	205,562	308	118
Issuance of Common Stock under employee stock plans	11,585	10	11,575				11,585
Issuance of Common Stock in public offering, net (See Note 12)	109,681	18	109,663				109,681
Stock-based compensation expense	5,883		5,883				5,883
Other	20		20				20
Components of comprehensive income, net of tax
Net income	17,922			17,910			17,910	12
Other comprehensive income	194				179		179	15
Total comprehensive income	18,116						18,089	27
Ending Balance at Dec. 31, 2020	351,155	433	328,392	161,008	(204)	(138,927)	350,820	335	118
Issuance of Common Stock under employee stock plans	10,243	6	10,237				10,243
Stock-based compensation expense	7,035		7,035				7,035
Components of comprehensive income, net of tax
Net income	56,629			56,625			56,625	4
Other comprehensive income	(1,157)				(1,124)		(1,124)	(33)
Total comprehensive income	55,472						55,501	(29)
Ending Balance at Dec. 31, 2021	$ 423,905	$ 439	$ 345,664	$ 217,633	$ (1,328)	$ (138,927)	$ 423,599	$ 306	$ 118