COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Total future minimum lease payments and commitments under non-cancelable agreements
Total	$ 37,149
2019	17,807
2020	13,328
2021	3,616
2022	2,398
2023	0
Thereafter	0
Unrecognized tax benefits	3,358	$ 2,381	$ 1,064
Other liabilities
Total future minimum lease payments and commitments under non-cancelable agreements
Unrecognized tax benefits	$ 4,800