INCOME TAXES - Income Tax Expense (Benefit) and Effective Tax Rate (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Income Tax Disclosure [Abstract]
Income tax expense	$ 3,689,000	$ 2,892,000	$ 886,000	$ 7,724,000
Effective tax rate	22.90%	27.40%	13.70%	27.40%
Income tax examination, penalties and interest expense	$ 0	$ 0	$ 0	$ 0