Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2021	Jul. 26, 2020	Aug. 01, 2021	Jul. 26, 2020
Income Statement [Abstract]
Net sales	$ 185,004	$ 143,660	$ 355,376	$ 276,362
Cost of sales	69,572	55,409	135,083	107,350
Gross profit	115,432	88,251	220,293	169,012
Operating costs and expenses:
Selling, general and administrative	41,977	38,255	80,781	72,855
Product development and engineering	35,497	29,220	72,287	56,806
Intangible amortization	1,298	2,020	2,596	4,860
Changes in the fair value of contingent earn-out obligations	0	0	0	(33)
Total operating costs and expenses	78,772	69,495	155,664	134,488
Operating income	36,660	18,756	64,629	34,524
Interest expense	(1,185)	(1,252)	(2,384)	(2,811)
Non-operating income (expense), net	213	(176)	307	247
Investment impairments and credit loss reserves	(468)	(1,485)	(714)	(5,115)
Income before taxes and equity in net gains (losses) of equity method investments	35,220	15,843	61,838	26,845
Provision (benefit) for income taxes	2,963	(416)	6,161	943
Net income before equity in net gains (losses) of equity method investments	32,257	16,259	55,677	25,902
Equity in net gains (losses) of equity method investments	674	(137)	752	(148)
Net income	32,931	16,122	56,429	25,754
Net loss attributable to noncontrolling interest	(2)	(3)	(4)	(6)
Net income attributable to common stockholders	$ 32,933	$ 16,125	$ 56,433	$ 25,760
Earnings per share:
Basic (in dollars per share)	$ 0.51	$ 0.25	$ 0.87	$ 0.39
Diluted (in dollars per share)	$ 0.50	$ 0.24	$ 0.86	$ 0.39
Weighted-average number of shares used in computing earnings per share:
Basic (in shares)	64,721	65,084	64,905	65,337
Diluted (in shares)	65,584	66,004	65,849	66,099