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Note 3 - Revenue Recognition - Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Revenues	$ 45,033	$ 51,595
Engineering Services [Member]
Revenues	14,163	19,055
Health Care [Member]
Revenues	22,197	24,171
Technology Service [Member]
Revenues	8,673	8,369
Time-and-materials Contract [Member] | Engineering Services [Member]
Revenues	12,827	13,843
Time-and-materials Contract [Member] | Health Care [Member]
Revenues	22,053	23,907
Time-and-materials Contract [Member] | Technology Service [Member]
Revenues	8,557	8,308
Fixed-price Contract [Member] | Engineering Services [Member]
Revenues	1,314	5,169
Permanent Placement Services [Member] | Engineering Services [Member]
Revenues	22	43
Permanent Placement Services [Member] | Health Care [Member]
Revenues	144	264
Permanent Placement Services [Member] | Technology Service [Member]
Revenues	$ 116	$ 61

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
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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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