Other Current Liabilities - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands		Oct. 02, 2020	Jan. 03, 2020
Other Liabilities Disclosure [Abstract]
Accrued salaries and wages		$ 5,194	$ 4,400
Accrued bonuses		1,000	4,184
Accrued insurance		96	1,346
Income taxes payable		3,898	2,710
Accrued consumption tax		1,228	1,164
Accrued professional fees for clinical trials		1,554	567
Marketing obligations		1,197	633
Other	[1]	3,445	2,693
Total other current liabilities		$ 17,612	$ 17,697

[1] No individual item in “Other” exceeds 5% of the other current liabilities