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Note 3 - Revenue Recognition - Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2019 | Jun. 30, 2018 | Jun. 29, 2019 | Jun. 30, 2018
Revenues | $ 50,705 | $ 51,710 | $ 102,300 | $ 102,522
Engineering Services [Member] |  |  |  |
Revenues | 18,583 | 21,571 | 37,638 | 42,988
Health Care [Member] |  |  |  |
Revenues | 23,370 | 22,858 | 47,540 | 45,492
Technology Service [Member] |  |  |  |
Revenues | 8,752 | 7,281 | 17,122 | 14,042
Time-and-materials Contract [Member] | Engineering Services [Member] |  |  |  |
Revenues | 13,528 | 19,220 | 27,371 | 38,460
Time-and-materials Contract [Member] | Health Care [Member] |  |  |  |
Revenues | 23,140 | 22,584 | 47,046 | 44,697
Time-and-materials Contract [Member] | Technology Service [Member] |  |  |  |
Revenues | 8,641 | 7,281 | 16,950 | 13,950
Fixed-price Contract [Member] | Engineering Services [Member] |  |  |  |
Revenues | 5,098 | 2,351 | 10,267 | 4,528
Permanent Placement Services [Member] | Engineering Services [Member] |  |  |  |
Revenues | (43) |  |  |
Permanent Placement Services [Member] | Health Care [Member] |  |  |  |
Revenues | 230 | 274 | 494 | 795
Permanent Placement Services [Member] | Technology Service [Member] |  |  |  |
Revenues | $ 111 |  | $ 172 | $ 92

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- 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 -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 + Details
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