Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2025	Jun. 28, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (37,904)	$ (137,640)	$ (28,335)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization expense	82,027	88,030	97,329
Stock-based compensation expense	25,019	25,669	27,753
Stock-based matching contributions on defined contribution plan	14,900	15,853	15,665
Benefit for deferred income taxes	(10,591)	(31,511)	(59,647)
Cash settlement for termination of interest rate swap	0		5,995
Provisions for bad debt	876	15,301	400
Other non-cash items	(3,577)	452	(1,146)
Changes in operating assets and liabilities:
Accounts receivable, unbilled receivables, and costs in excess of billings	29,950	76,458	(58,718)
Inventory	(17,087)	130	(64,061)
Prepaid income taxes	(575)	0	7,433
Prepaid expenses and other current assets	5,538	(1,693)	2,942
Other non-current assets	8,217	148	3,769
Accounts payable, accrued expenses and accrued compensation	8,103	741	(16,732)
Deferred revenues and customer advances	49,890	17,307	40,701
Income taxes payable	(3,813)	(11,217)	9,907
Other non-current liabilities	(12,122)	(5,049)	(4,509)
Net cash provided by (used in) operating activities	138,851	60,382	(21,254)
Cash flows from investing activities:
Purchases of property and equipment	(19,803)	(34,291)	(38,796)
Acquisition of businesses, net of cash acquired	(4,543)	0	0
Proceeds from sale of manufacturing operations to Cicor Group	6,246	0	0
Other investing activities	4,600	0	235
Net cash used in investing activities	(13,500)	(34,291)	(38,561)
Cash flows from financing activities:
Proceeds from employee stock plans	3,661	4,642	5,492
Payments for retirement of common stock	0	(31)	(63)
Payments under credit facilities	0	(25,000)	(80,000)
Borrowings under credit facilities	0	105,000	140,000
Payments of deferred financing and offering costs	(2,249)	(1,931)	0
Net cash provided by financing activities	1,412	82,680	65,429
Effect of exchange rate changes on cash and cash equivalents	1,815	187	295
Net increase in cash and cash equivalents	128,578	108,958	5,909
Cash and cash equivalents at beginning of year	180,521	71,563	65,654
Cash and cash equivalents at end of year	309,099	180,521	71,563
Cash paid (received) during the period for:
Interest	36,559	37,423	27,288
Income taxes paid (refunded), net	365	(9,315)	24,243
Non-cash investing activity: Purchases of property and equipment incurred but not yet paid	3,895	4,051	6,475
Non-cash investing activity: Inventory transfer to property and equipment, net	$ 12,675	$ 0	$ 0