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Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 28, 2024
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(in thousands) |  | 2024 |  |  | 2023 |  |  | 2022 |
Weighted average common shares outstanding |  |  | 46,908 |  |  |  | 47,486 |  |  |  | 48,178 |
Effect of dilutive stock options and restricted stock units |  |  | - |  |  |  | 539 |  |  |  | 621 |
|  |  | 46,908 |  |  |  | 48,025 |  |  |  | 48,799 |
Schedule of Inventory, Current [Table Text Block] |
|  | December 28, |  |  | December 30, |
|  | 2024 |  |  | 2023 |
Raw materials and purchased parts |  | $ | 94,970 |  |  | $ | 103,118 |
Work in process |  |  | 25,833 |  |  |  | 26,820 |
Finished goods |  |  | 21,058 |  |  |  | 25,855 |
Total inventories |  | $ | 141,861 |  |  | $ | 155,793 |
Property, Plant and Equipment [Table Text Block] |
|  | December 28, |  |  | December 30, |
|  | 2024 |  |  | 2023 |
Land and land improvements |  | $ | 6,941 |  |  | $ | 7,301 |
Buildings and building improvements |  |  | 47,733 |  |  |  | 39,677 |
Machinery and equipment |  |  | 104,767 |  |  |  | 108,831 |
|  |  | 159,441 |  |  |  | 155,809 |
Less accumulated depreciation and amortization |  |  | (84,655 | ) |  |  | (86,724 | )
Property, plant and equipment, net |  | $ | 74,786 |  |  | $ | 69,085 |
Disaggregation of Revenue [Table Text Block] |
(in thousands) |  | 2024 |  |  | 2023 |  |  | 2022 |
Systems-Semiconductor Test & Inspection |  | $ | 139,133 |  |  | $ | 326,448 |  |  | $ | 474,655 |
Non-systems-Semiconductor Test & Inspection |  |  | 262,646 |  |  |  | 309,874 |  |  |  | 338,120 |
Net sales |  | $ | 401,779 |  |  | $ | 636,322 |  |  | $ | 812,775 |

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