PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Property and Equipment
Property and equipment — gross	$ 153,653	$ 121,654
Accumulated depreciation	(71,043)	(47,557)
Property and equipment — net	82,610	74,097
Depreciation expense	23,200	19,500	$ 15,400
Property and equipment - geographic	82,610	74,097
United States
Property and Equipment
Property and equipment — net	70,672	65,831
Property and equipment - geographic	70,672	65,831
International
Property and Equipment
Property and equipment — net	11,938	8,266
Property and equipment - geographic	11,938	8,266
Production molds, tooling, and equipment
Property and Equipment
Property and equipment — gross	56,375	45,614
Furniture, fixtures, and equipment
Property and Equipment
Property and equipment — gross	7,721	5,752
Computers and software
Property and Equipment
Property and equipment — gross	52,930	41,209
Leasehold improvements
Property and Equipment
Property and equipment — gross	35,419	29,079
Finance leases
Property and Equipment
Property and equipment — gross	$ 1,208	$ 0