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. 01, 2021	Jan. 03, 2020	Dec. 28, 2018
Balance	$ (3,048)	$ (1,320)	$ (1,150)
Other comprehensive income (loss)	(2,639)	(1,867)	(155)
Tax effect	142	139	(15)
Balance	(5,545)	(3,048)	(1,320)
Foreign Currency Translation
Balance	651	446	278
Other comprehensive income (loss)	717	291	242
Tax effect	(217)	(86)	(74)
Balance	1,151	651	446
Defined Benefit Pension Plan | JAPAN
Balance	38	10	88
Other comprehensive income (loss)	(33)	34	(107)
Tax effect	10	(6)	29
Balance	15	38	10
Defined Benefit Pension Plan | SWITZERLAND
Balance	(3,737)	(1,776)	(1,516)
Other comprehensive income (loss)	(3,323)	(2,192)	(290)
Tax effect	349	231	30
Balance	$ (6,711)	$ (3,737)	$ (1,776)