Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 26, 2022	Mar. 27, 2021	Dec. 25, 2021
Cash flows from operating activities:
Net income	$ 21,569	$ 27,607
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on business divestitures	0	115
Loss on extinguishment of debt	104	1,761
Gain from sale of property, plant and equipment	(51)	(65)
Depreciation and amortization	11,667	12,567
Share-based compensation expense	3,422	3,523
Non-cash inventory related charges	647	1,110
Deferred income taxes	397	280
Changes in accrued retiree medical benefits	(10)	(81)
Changes in other accrued liabilities	(332)	(78)
Changes in other assets	(128)	62
Amortization of cloud-based software implementation costs	478	370
Interest capitalized associated with cloud computing implementation	(26)	(43)
Amortization of debt discounts and issuance costs	94	250
Changes in assets and liabilities:
Customer advances	6,101	882
Accounts receivable	(19,873)	(47,241)
Inventories	(1,123)	(20,804)
Other current assets	(5,675)	(6,629)
Accounts payable	(361)	28,371
Deferred profit	(2,141)	4,383
Income taxes payable	2,257	5,131
Accrued compensation, warranty and other liabilities	(15,059)	(5,457)
Operating lease right-of-use assets	1,343	1,556
Current and long-term operating lease liabilities	(1,309)	(1,382)
Net cash provided by operating activities	1,991	6,188
Cash flows from investing activities:
Cash received from sale of property, plant and equipment	57	98
Purchases of short-term investments	(45,413)	(129,736)
Sales and maturities of short-term investments	43,250	2,481
Purchases of property, plant and equipment	(2,669)	(2,700)
Net cash used in investing activities	(4,775)	(129,857)
Cash flows from financing activities:
Payments on current and long-term finance lease liabilities	(44)	(45)
Repurchases of common stock, net	(4,082)	(5,421)
Proceeds from revolving line of credit and construction loans	0	818
Proceeds received from issuance of common stock, net of fees	0	223,118
Repayments of long-term debt	(9,056)	(101,922)
Acquisition of treasury stock	(5,949)	0
Net cash provided by (used in) financing activities	(19,131)	116,548
Effect of exchange rate changes on cash and cash equivalents	(1,218)	882
Net decrease in cash and cash equivalents	(23,133)	(6,239)
Cash and cash equivalents at beginning of period	290,201	149,358	$ 149,358
Cash and cash equivalents at end of period	267,068	143,119	$ 290,201
Supplemental disclosure of cash flow information:
Cash paid for income taxes	3,669	279
Inventory capitalized as property, plant and equipment	460	455
Property, plant and equipment purchases included in accounts payable	1,180	862
Cash paid for interest	$ 606	$ 2,532