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STOCK-BASED COMPENSATION - General Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2022	Jul. 04, 2021	Jul. 03, 2022	Jul. 04, 2021	Jun. 28, 2015
Stock-based compensation
Stock-based compensation expense	$ 636	$ 320	$ 1,020	$ 638
Equity Option
Stock-based compensation
Stock-based compensation expense	79	94	166	183
Restricted stock and restricted stock units
Stock-based compensation
Stock-based compensation expense	$ 557	$ 226	$ 854	$ 455
Employees and Directors \| Equity Option
Stock-based compensation
Expiration period			10 years
Employees and Directors \| Minimum \| Equity Option
Stock-based compensation
Vesting period			2 years
Employees and Directors \| Maximum \| Equity Option
Stock-based compensation
Vesting period			4 years
2015 Plan
Stock-based compensation
Shares authorized for issuance					2,000,000
Shares available for grant	474,909		474,909
2005 Plan
Stock-based compensation
Shares available for grant	0		0