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Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 27, 2025
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(in thousands) |  | 2025 |  |  | 2024 |  |  | 2023 |
Weighted average common shares outstanding |  |  | 46,723 |  |  |  | 46,908 |  |  |  | 47,486 |
Effect of dilutive stock options and restricted stock units |  |  | - |  |  |  | - |  |  |  | 539 |
|  |  | 46,723 |  |  |  | 46,908 |  |  |  | 48,025 |
Schedule of Inventory, Current [Table Text Block] |
|  | December 27, |  |  | December 28, |
|  | 2025 |  |  | 2024 |
Raw materials and purchased parts |  | $ | 84,797 |  |  | $ | 94,970 |
Work in process |  |  | 23,388 |  |  |  | 25,833 |
Finished goods |  |  | 20,821 |  |  |  | 21,058 |
Total inventories |  | $ | 129,006 |  |  | $ | 141,861 |
Property, Plant and Equipment [Table Text Block] |
|  | December 27, |  |  | December 28, |
|  | 2025 |  |  | 2024 |
Land and land improvements |  | $ | 12,364 |  |  | $ | 6,941 |
Buildings and building improvements |  |  | 49,469 |  |  |  | 47,733 |
Machinery and equipment |  |  | 103,273 |  |  |  | 104,767 |
|  |  | 165,106 |  |  |  | 159,441 |
Less accumulated depreciation and amortization |  |  | (88,119 | ) |  |  | (84,655 | )
Property, plant and equipment, net |  | $ | 76,987 |  |  | $ | 74,786 |
Disaggregation of Revenue [Table Text Block] |
(in thousands) |  | 2025 |  |  | 2024 |  |  | 2023 |
Systems-Semiconductor Test & Inspection |  | $ | 180,627 |  |  | $ | 139,133 |  |  | $ | 326,448 |
Non-systems-Semiconductor Test & Inspection |  |  | 272,329 |  |  |  | 262,646 |  |  |  | 309,874 |
Net sales |  | $ | 452,956 |  |  | $ | 401,779 |  |  | $ | 636,322 |

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