Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 26, 2024	Oct. 28, 2023	Oct. 26, 2024	Oct. 28, 2023
Revenue:
Revenue	$ 188,458,000	$ 180,816,000	$ 377,941,000	$ 333,163,000
Cost of sales:
Cost of sales	114,820,000	105,466,000	222,836,000	192,153,000
Gross margin:
Total gross margin	73,638,000	75,350,000	155,105,000	141,010,000
Selling, general and administrative	37,916,000	28,147,000	71,711,000	51,974,000
Research and development	28,716,000	22,025,000	53,329,000	37,491,000
Income from operations	7,006,000	25,178,000	30,065,000	51,545,000
Other loss:
Interest expense, net	(690,000)	(1,950,000)	(929,000)	(3,958,000)
Other income (expense), net	16,000	(2,858,000)	(218,000)	(3,987,000)
Income before income taxes	6,332,000	20,370,000	28,918,000	43,600,000
(Benefit from) provision for income taxes	(221,000)	1,137,000	1,264,000	2,451,000
Equity method investment income (loss), net of tax	990,000	(1,393,000)	1,055,000	(1,414,000)
Net income	$ 7,543,000	$ 17,840,000	$ 28,709,000	$ 39,735,000
Net income per share
Basic (in dollars per share)	$ 0.27	$ 0.66	$ 1.03	$ 1.50
Diluted (in dollars per share)	$ 0.27	$ 0.66	$ 1.02	$ 1.50
Weighted-average shares outstanding:
Basic (in shares)	28,009,963	26,865,763	27,985,425	26,479,168
Diluted (in shares)	28,145,590	26,956,806	28,139,942	26,569,267
Product sales
Revenue:
Revenue	$ 151,231,000	$ 145,779,000	$ 310,735,000	$ 265,250,000
Cost of sales:
Cost of sales	87,052,000	79,032,000	172,571,000	140,640,000
Gross margin:
Total gross margin	64,179,000	66,747,000	138,164,000	124,610,000
Contract services
Revenue:
Revenue	37,227,000	35,037,000	67,206,000	67,913,000
Cost of sales:
Cost of sales	27,768,000	26,434,000	50,265,000	51,513,000
Gross margin:
Total gross margin	$ 9,459,000	$ 8,603,000	$ 16,941,000	$ 16,400,000