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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 27, 2025 | Dec. 28, 2024 | Dec. 30, 2023
Cash flows from operating activities: |  |  |
Net income (loss) | $ (74,273) | $ (69,818) | $ 28,156
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |
Net accretion on investments | (1,457) | (1,254) | (1,364)
Loss on extinguishment of debt | 0 | 241 | 369
Pension curtailment gain | (2,159) | 0 | 0
Depreciation and amortization | 50,685 | 52,487 | 49,744
Share-based compensation expense | 23,042 | 20,740 | 17,237
Inventory related charges | 8,211 | 4,977 | 5,619
Amortization of debt discounts and issuance costs | 422 | 8 | 146
Changes in accrued retiree medical benefits | (1,817) | (1,589) | (540)
Deferred income taxes | (1,802) | (3,722) | (4,774)
Impairment charge related to equity investment | 0 | 903 | 0
Change in fair value of contingent consideration liability | (1,700) | 0 | 0
Changes in other assets | 426 | (3,831) | (13,286)
Amortization of cloud-based software implementation costs | 2,836 | 2,836 | 2,800
(Gain) loss from sale of property, plant and equipment | 141 | 176 | (4)
Changes in other accrued liabilities | (175) | (1,309) | (702)
Operating lease right-of-use assets | 7,148 | 5,812 | 7,656
Changes in current assets and liabilities: |  |  |
Customer advances | (208) | (1,835) | (2,309)
Accounts receivable, net | (14,466) | 34,850 | 61,899
Inventories | 4,280 | 6,374 | 12,839
Accrued compensation, warranty and other liabilities | 8,614 | (15,449) | (14,897)
Accounts payable | 10,296 | (3,560) | (21,356)
Deferred profit | 3,707 | 26 | (4,447)
Other current assets | 15,353 | (16,148) | 10,920
Income taxes payable | 1,450 | (2,234) | (24,782)
Current and long-term operating lease liabilities | (6,862) | (5,903) | (7,454)
Net cash provided by operating activities | 31,692 | 2,778 | 101,470
Cash flows from investing activities: |  |  |
Purchases of property, plant and equipment | (20,958) | (10,634) | (16,053)
Net cash received from sale of assets | 504 | 107 | 216
Purchases of short-term investments | (263,417) | (78,573) | (97,290)
Sales and maturities of short-term investments | 63,762 | 114,228 | 152,649
Settlement of net investment hedge | (2,145) | (3,212) | 0
Net cash provided by (used in) investing activities | (257,017) | 21,916 | (30,210)
Cash flows from financing activities: |  |  |
Proceeds from revolving line of credit, revolving credit facility and convertible notes | 296,295 | 0 | 0
Payment of debt issuance costs | (9,435) | 0 | 0
Purchase of capped calls related to convertible notes | (31,395) | 0 | 0
Repayments of long-term debt | (1,733) | (31,324) | (38,788)
Payments on finance lease liabilities | (7) | (24) | (52)
Acquisition of treasury stock | (8,586) | (26,986) | (23,641)
Net issuance (repurchases) of stock, including awards settled in cash | 1,187 | (701) | (5,656)
Net cash provided by (used in) financing activities | 246,326 | (59,035) | (68,137)
Effect of exchange rate changes on cash and cash equivalents |  |  |
Effect of exchange rate changes on cash and cash equivalents | (355) | (4,776) | 60
Net decrease in cash and cash equivalents | 20,646 | (39,117) | 3,183
Cash and cash equivalents at beginning of year | 206,407 | 245,524 | 242,341
Cash and cash equivalents at end of year | 227,053 | 206,407 | 245,524
Supplemental disclosure of cash flow information:Cash Flow Information [Abstract] |  |  |
Cash paid for income taxes, net of refunds | (2,829) | 24,926 | 44,276
Cash paid for interest | 536 | 803 | 3,424
Property, plant and equipment purchases included in accounts payable | 307 | 454 | 124
Inventory capitalized as capital assets | 1,241 | 1,765 | 1,215
Tignis, Inc [Member] |  |  |
Cash flows from investing activities: |  |  |
Payment for purchase of business, net of cash received | (34,763) | 0 | 0
MCT Worldwide, LLC [Member] |  |  |
Cash flows from investing activities: |  |  |
Payment for purchase of business, net of cash received | 0 | 0 | (26,331)
Equiptest Engineering Pte Ltd. [Member] |  |  |
Cash flows from investing activities: |  |  |
Payment for purchase of business, net of cash received | $ 0 | $ 0 | $ (43,401)

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- Definition Amount of noncash expense (reversal of expense) for pension benefits. Excludes other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-14 + Details
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- Definition Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-11 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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