Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Current:
State	$ 19	$ 26
Foreign	27	9
Total	46	35
Deferred:
Federal	1	1
State	1	1
Total	2	2
Provision for income taxes	$ 48	$ 37