Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Cash flows from operating activities:
Net income (loss)	$ (14,635)	$ 15,685
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Loss on extinguishment of debt	241	369
Net accretion on investments	(321)	(289)
Loss from sale of property, plant and equipment	1	43
Depreciation and amortization	13,224	12,091
Share-based compensation expense	4,628	3,914
Non-cash inventory related charges	1,674	1,993
Deferred income taxes	818	872
Changes in accrued retiree medical benefits	(26)	(181)
Changes in other accrued liabilities	(35)	(128)
Changes in other assets	159	208
Amortization of cloud-based software implementation costs	709	700
Impairment charge related to equity investment	966	0
Amortization of debt discounts and issuance costs	8	49
Operating lease right-of-use assets	1,858	1,316
Changes in assets and liabilities, excluding effects from acquisitions:
Customer advances	(7)	6,192
Accounts receivable	6,817	5,364
Inventories	1,524	(5,164)
Other current assets	(11,422)	756
Accounts payable	(3,488)	75
Deferred profit	(527)	(2,300)
Income taxes payable	(3,449)	(8,180)
Accrued compensation, warranty and other liabilities	(10,849)	(15,545)
Current and long-term operating lease liabilities	(1,832)	(1,355)
Net cash provided by (used in) operating activities	(13,964)	16,485
Cash flows from investing activities, excluding effects from acquisitions:
Purchases of short-term investments	(21,855)	(16,816)
Sales and maturities of short-term investments	31,999	62,989
Purchases of property, plant and equipment	(3,327)	(5,075)
Cash received from sale of property, plant and equipment	0	120
Net cash provided by investing activities	6,817	14,285
Cash flows from financing activities:
Payments on current and long-term finance lease liabilities	(8)	(24)
Repurchases of common stock, net	(4,104)	(8,578)
Repayments of long-term debt	(29,617)	(35,290)
Acquisition of treasury stock	(10,698)	(3,481)
Net cash used in financing activities	(44,427)	(47,373)
Effect of exchange rate changes on cash and cash equivalents	(2,885)	911
Net decrease in cash and cash equivalents	(54,459)	(15,692)
Cash and cash equivalents at beginning of period	245,524	242,341
Cash and cash equivalents at end of period	191,065	226,649
Supplemental disclosure of cash flow information:
Cash paid for income taxes	6,101	3,760
Inventory capitalized as property, plant and equipment	396	317
Property, plant and equipment purchases included in accounts payable	232	235
Cash paid for interest	735	1,784
MCT Worldwide, LLC [Member]
Cash flows from investing activities, excluding effects from acquisitions:
Payment for purchase of business, net of cash received	$ 0	$ (26,933)