LINE OF CREDIT (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
Line of Credit Facility [Abstract]
Credit facility with a bank	$ 40
Description of interest rate of credit facility	LIBOR
Line of credit interest rate (in percent)	0.11%
Line of credit basis points	1.50%
Line of credit unused portion per year (in percent)	0.25%
Revolving credit facility, expiration date	Sep. 30, 2021
Proceeds from line of credit		$ 1