Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 25, 2020	Oct. 31, 2021	Oct. 25, 2020
Income Statement [Abstract]
Net sales	$ 194,932	$ 154,082	$ 550,308	$ 430,444
Cost of sales	71,243	60,021	206,326	167,371
Gross profit	123,689	94,061	343,982	263,073
Operating costs and expenses:
Selling, general and administrative	47,621	42,891	128,402	115,746
Product development and engineering	37,346	27,890	109,633	84,696
Intangible amortization	1,298	1,798	3,894	6,658
Changes in the fair value of contingent earn-out obligations	0	0	0	(33)
Total operating costs and expenses	86,265	72,579	241,929	207,067
Operating income	37,424	21,482	102,053	56,006
Interest expense	(1,233)	(1,008)	(3,617)	(3,819)
Non-operating income (expense), net	105	(236)	412	11
Investment impairments and credit loss reserves	(216)	(335)	(930)	(5,450)
Income before taxes and equity in net gains of equity method investments	36,080	19,903	97,918	46,748
Provision for income taxes	3,018	1,580	9,179	2,523
Net income before equity in net gains of equity method investments	33,062	18,323	88,739	44,225
Equity in net gains of equity method investments	1,363	159	2,115	11
Net income	34,425	18,482	90,854	44,236
Net loss attributable to noncontrolling interest	(2)	(5)	(6)	(11)
Net income attributable to common stockholders	$ 34,427	$ 18,487	$ 90,860	$ 44,247
Earnings per share:
Basic (in dollars per share)	$ 0.53	$ 0.28	$ 1.40	$ 0.68
Diluted (in dollars per share)	$ 0.53	$ 0.28	$ 1.38	$ 0.67
Weighted-average number of shares used in computing earnings per share:
Basic (in shares)	64,546	65,136	64,786	65,270
Diluted (in shares)	65,299	65,967	65,664	66,050