Goodwill (Details) - USD ($)		6 Months Ended
Jul. 01, 2019	Jun. 30, 2020
Goodwill [Roll Forward]
Balance, December 31, 2019		$ 48,024,000
Translation adjustments		(3,593,000)
Balance, June 30, 2020		$ 44,431,000
Goodwill impairment	$ 0

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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