v3.21.2

STOCK-BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020	Jun. 28, 2015
Stock-based compensation
Stock-based compensation expense	$ 294	$ 174	$ 932	$ 422
Stock Options
Stock-based compensation
Stock-based compensation expense	62	110	245	235
Restricted Stock
Stock-based compensation
Stock-based compensation expense	$ 232	$ 64	$ 687	$ 187
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					2,000,000
Shares available for grant	723,690		723,690
2005 Plan
Stock-based compensation
Shares available for grant	0		0

X

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

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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