Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Cash flows from operating activities:
Net income	$ 15,685	$ 21,569
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on extinguishment of debt	369	104
Net accretion on investments	(289)	0
(Gain) loss from sale of property, plant and equipment	43	(51)
Depreciation and amortization	12,091	11,667
Share-based compensation expense	3,914	3,422
Non-cash inventory related charges	1,993	647
Deferred income taxes	872	397
Changes in accrued retiree medical benefits	(181)	(10)
Changes in other accrued liabilities	(128)	(332)
Changes in other assets	208	(128)
Amortization of cloud-based software implementation costs	700	478
Interest capitalized associated with cloud computing implementation	0	(26)
Amortization of debt discounts and issuance costs	49	94
Operating lease right-of-use assets	1,316	1,343
Changes in assets and liabilities, excluding effects from acquisitions:
Customer advances	6,192	6,101
Accounts receivable	5,364	(19,873)
Inventories	(5,164)	(1,123)
Other current assets	756	(5,675)
Accounts payable	75	(361)
Deferred profit	(2,300)	(2,141)
Income taxes payable	(8,180)	2,257
Accrued compensation, warranty and other liabilities	(15,545)	(15,059)
Current and long-term operating lease liabilities	(1,355)	(1,309)
Net cash provided by operating activities	16,485	1,991
Cash flows from investing activities, excluding effects from acquisitions:
Purchases of short-term investments	(16,816)	(45,413)
Sales and maturities of short-term investments	62,989	43,250
Purchases of property, plant and equipment	(5,075)	(2,669)
Cash received from sale of property, plant and equipment	120	57
Payment for purchase of MCT, net of cash received	(26,933)	0
Net cash provided by (used in) investing activities	14,285	(4,775)
Cash flows from financing activities:
Payments on current and long-term finance lease liabilities	(24)	(44)
Repurchases of common stock, net	(8,578)	(4,082)
Repayments of long-term debt	(35,290)	(9,056)
Acquisition of treasury stock	(3,481)	(5,949)
Net cash used in financing activities	(47,373)	(19,131)
Effect of exchange rate changes on cash and cash equivalents	911	(1,218)
Net decrease in cash and cash equivalents	(15,692)	(23,133)
Cash and cash equivalents at beginning of period	242,341	290,201
Cash and cash equivalents at end of period	226,649	267,068
Supplemental disclosure of cash flow information:
Cash paid for income taxes	3,760	3,669
Inventory capitalized as property, plant and equipment	317	460
Property, plant and equipment purchases included in accounts payable	235	1,180
Cash paid for interest	$ 1,784	$ 606