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Note 3 - Revenue Recognition - Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
Revenue	$ 44,549	$ 45,033
Engineering Services [Member]
Revenue	14,466	14,163
Health Care [Member]
Revenue	21,137	22,197
Technology Service [Member]
Revenue	8,946	8,673
Time-and-materials Contract [Member] | Engineering Services [Member]
Revenue	10,478	12,827
Time-and-materials Contract [Member] | Health Care [Member]
Revenue	20,933	22,053
Time-and-materials Contract [Member] | Technology Service [Member]
Revenue	8,796	8,557
Fixed-price Contract [Member] | Engineering Services [Member]
Revenue	3,921	1,314
Permanent Placement Services [Member] | Engineering Services [Member]
Revenue	67	22
Permanent Placement Services [Member] | Health Care [Member]
Revenue	204	144
Permanent Placement Services [Member] | Technology Service [Member]
Revenue	$ 150	$ 116

X

- Definition

Amount, including 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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