Organization and Description of Business and Accounting Policies - Summary of Changes in Accumulated Other Comprehensive Income (Loss) - (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 03, 2020	Dec. 28, 2018	Dec. 29, 2017
Balance	$ (1,320)	$ (1,150)	$ (1,050)
Other comprehensive income (loss)	(1,867)	(155)	(25)
Tax effect	139	(15)	(75)
Balance	(3,048)	(1,320)	(1,150)
Foreign Currency Translation
Balance	446	278	11
Other comprehensive income (loss)	291	242	387
Tax effect	(86)	(74)	(120)
Balance	651	446	278
Defined Benefit Pension Plan \| JAPAN
Balance	10	88	88
Other comprehensive income (loss)	34	(107)	(6)
Tax effect	(6)	29	6
Balance	38	10	88
Defined Benefit Pension Plan \| SWITZERLAND
Balance	(1,776)	(1,516)	(1,149)
Other comprehensive income (loss)	(2,192)	(290)	(406)
Tax effect	231	30	39
Balance	$ (3,737)	$ (1,776)	$ (1,516)

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant