Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2016	Jul. 26, 2015	Jul. 31, 2016	Jul. 26, 2015
Net sales	$ 135,911	$ 125,712	$ 267,056	$ 255,800
Cost of sales	54,136	50,136	106,757	101,824
Gross profit	81,775	75,576	160,299	153,976
Operating costs and expenses:
Selling, general and administrative	32,824	33,798	66,538	71,635
Product development and engineering	26,325	28,239	51,497	57,917
Intangible amortization	6,328	6,177	12,731	12,340
Changes in the fair value of contingent earn-out obligations	(129)	730	(162)	568
Restructuring charge	0	3,564	0	3,564
Total operating costs and expenses	65,348	72,508	130,604	146,024
Operating income	16,427	3,068	29,695	7,952
Interest expense, net	(2,037)	(1,900)	(3,967)	(3,734)
Non-operating (expense) income, net	(136)	117	(181)	(376)
Income before taxes	14,254	1,285	25,547	3,842
Provision for taxes	5,276	1,598	9,681	4,297
Net income (loss)	$ 8,978	$ (313)	$ 15,866	$ (455)
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.14	$ 0.00	$ 0.24	$ (0.01)
Diluted (in dollars per share)	$ 0.14	$ 0.00	$ 0.24	$ (0.01)
Weighted average number of shares used in computing earnings per share:
Basic (in shares)	65,299	65,920	65,222	66,319
Diluted (in shares)	65,905	65,920	65,723	66,319