Consolidated Condensed Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Income Statement [Abstract]
Net revenues	$ 59,146	$ 70,870	$ 126,842	$ 147,395
Costs of products sold	36,036	42,261	78,667	85,735
Gross profit	23,110	28,609	48,175	61,660
Selling, general, and administrative expenses	18,640	19,896	38,931	40,344
Executive severance costs	0	611	0	611
Restructuring costs	499	0	629	0
Operating income	3,971	8,102	8,615	20,705
Other income (expense):
Interest expense	(267)	(359)	(728)	(747)
Other	(1,273)	(160)	(590)	(932)
Other income (expense)	(1,540)	(519)	(1,318)	(1,679)
Income before taxes	2,431	7,583	7,297	19,026
Income tax expense	684	2,003	2,258	5,120
Net earnings	1,747	5,580	5,039	13,906
Less: net (loss) earnings attributable to noncontrolling interests	(12)	15	(32)	98
Net earnings attributable to VPG stockholders	$ 1,759	$ 5,565	$ 5,071	$ 13,808
Basic earnings per share attributable to VPG stockholders (dollars per share)	$ 0.13	$ 0.41	$ 0.37	$ 1.02
Diluted earnings per share attributable to VPG stockholders (dollars per share)	$ 0.13	$ 0.41	$ 0.37	$ 1.02
Weighted average shares outstanding - basic (in shares)	13,571	13,518	13,556	13,506
Weighted average shares outstanding - diluted (in shares)	13,609	13,595	13,598	13,579