Consolidated Condensed Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Income Statement [Abstract]
Net revenues	$ 75,339	$ 59,146	$ 145,928	$ 126,842
Costs of products sold	45,541	36,036	87,508	78,667
Gross profit	29,798	23,110	58,420	48,175
Selling, general, and administrative expenses	22,453	18,640	44,636	38,931
Acquisition costs	1,198	0	1,198	0
Impairment of goodwill and indefinite-lived intangibles	1,223	0	1,223	0
Restructuring costs	0	499	0	629
Operating income	4,924	3,971	11,363	8,615
Other income (expense):
Interest expense	(273)	(267)	(578)	(728)
Other	(326)	(1,273)	247	(590)
Other income (expense)	(599)	(1,540)	(331)	(1,318)
Income before taxes	4,325	2,431	11,032	7,297
Income tax expense	262	684	2,026	2,258
Net earnings	4,063	1,747	9,006	5,039
Less: net earnings (loss) attributable to noncontrolling interests	143	(12)	125	(32)
Net earnings attributable to VPG stockholders	$ 3,920	$ 1,759	$ 8,881	$ 5,071
Basic earnings per share attributable to VPG stockholders (dollars per share)	$ 0.29	$ 0.13	$ 0.65	$ 0.37
Diluted earnings per share attributable to VPG stockholders (dollars per share)	$ 0.29	$ 0.13	$ 0.65	$ 0.37
Weighted average shares outstanding - basic (in shares)	13,618	13,571	13,605	13,556
Weighted average shares outstanding - diluted (in shares)	13,646	13,609	13,638	13,598