RESTRUCTURING AND ASSET IMPAIRMENTS - Narrative (Details) - USD ($)	Mar. 28, 2020	Dec. 28, 2019	Mar. 30, 2019	Dec. 29, 2018
Restructuring Cost and Reserve [Line Items]
Severance and other personnel related costs liability and lease obligation liabilities	$ 2,531,000	$ 6,406,000	$ 2,113,000	$ 2,921,000
Accrued Compensation
Restructuring Cost and Reserve [Line Items]
Severance and other personnel related costs liability and lease obligation liabilities	2,400,000		1,800,000
Severance and Transition Costs | Other Noncurrent Liabilities
Restructuring Cost and Reserve [Line Items]
Severance and other personnel related costs liability and lease obligation liabilities	$ 100,000		$ 300,000