REVENUE RECOGNITION (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 24, 2022	Sep. 30, 2023	Sep. 24, 2022
Total revenue	$ 9,450	$ 13,056	$ 32,381	$ 31,777
Fixed-Price Revenue
Total revenue	7,079	10,037	23,596	24,136
Time-and-Material Revenue
Total revenue	$ 2,371	$ 3,019	$ 8,785	$ 7,641

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details