v3.21.1

STOCK-BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020	Jun. 28, 2015
Stock-based compensation
Stock-based compensation expense	$ 318	$ 137
Stock Options
Stock-based compensation
Stock-based compensation expense	89	81
Restricted Stock
Stock-based compensation
Stock-based compensation expense	$ 229	$ 56
Employees and Directors | Stock Options
Stock-based compensation
Expiration period	10 years
Employees and Directors | Minimum | Stock Options
Stock-based compensation
Vesting period	2 years
Employees and Directors | Maximum | Stock Options
Stock-based compensation
Vesting period	5 years
2015 Plan
Stock-based compensation
Shares authorized for issuance			1,500,000
Shares available for grant	184,476
2005 Plan
Stock-based compensation
Shares available for grant	0

X

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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