Condensed Consolidated Statements Of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	May 02, 2021	Apr. 26, 2020
Income Statement [Abstract]
Net sales	$ 170,372	$ 132,702
Cost of sales	65,511	51,941
Gross profit	104,861	80,761
Operating costs and expenses:
Selling, general and administrative	38,804	34,600
Product development and engineering	36,790	27,586
Intangible amortization	1,298	2,840
Changes in the fair value of contingent earn-out obligations	0	(33)
Total operating costs and expenses	76,892	64,993
Operating income	27,969	15,768
Interest expense	(1,199)	(1,559)
Non-operating income, net	94	423
Investment impairments and credit loss reserves	(246)	(3,630)
Income before taxes and equity in net gains (losses) of equity method investments	26,618	11,002
Provision for income taxes	3,198	1,359
Net income before equity in net gains (losses) of equity method investments	23,420	9,643
Equity in net gains (losses) of equity method investments	78	(11)
Net income	23,498	9,632
Net loss attributable to noncontrolling interest	(2)	(3)
Net income attributable to common stockholders	$ 23,500	$ 9,635
Earnings per share:
Basic (in dollars per share)	$ 0.36	$ 0.15
Diluted (in dollars per share)	$ 0.36	$ 0.15
Weighted-average number of shares used in computing earnings per share:
Basic (in shares)	65,089	65,589
Diluted (in shares)	66,110	66,174