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Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 30, 2023 | Dec. 31, 2022 | Jan. 01, 2022
Revenue | $ 263,237 | $ 284,680 | $ 203,875
Health Care [Member] |  |  |
Revenue | 136,241 | 159,448 | 98,495
Health Care [Member] | Time-and-Materials Contract [Member] |  |  |
Revenue | 134,941 | 158,001 | 97,363
Health Care [Member] | Permanent Placement Services [Member] |  |  |
Revenue | 1,300 | 1,447 | 1,132
Engineering Services [Member] |  |  |
Revenue | 84,675 | 85,937 | 66,172
Engineering Services [Member] | Time-and-Materials Contract [Member] |  |  |
Revenue | 42,443 | 44,915 | 33,937
Engineering Services [Member] | Permanent Placement Services [Member] |  |  |
Revenue | 0 | 1 | 67
Engineering Services [Member] | Fixed-Price Contract [Member] |  |  |
Revenue | 42,232 | 41,021 | 32,168
Technology Service [Member] |  |  |
Revenue | 42,321 | 39,295 | 39,208
Technology Service [Member] | Time-and-Materials Contract [Member] |  |  |
Revenue | 35,368 | 35,473 | 37,181
Technology Service [Member] | Permanent Placement Services [Member] |  |  |
Revenue | 402 | 800 | 637
Technology Service [Member] | Fixed-Price Contract [Member] |  |  |
Revenue | $ 6,551 | $ 3,022 | $ 1,390

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