Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Net revenues:
Total net revenues	$ 67,620	$ 88,604	$ 134,720	$ 170,917
Costs of net revenues:
Amortization of intangible assets	471	35	936	70
Total costs of net revenues	32,448	37,713	65,760	72,495
Gross profit	35,172	50,891	68,960	98,422
Operating expenses:
Research and development	14,098	12,491	27,085	22,693
Selling	8,244	10,151	17,526	19,175
General and administrative	7,885	7,465	15,790	15,206
Merger expenses	907		907
Amortization of intangible assets	289		578
Total operating expenses	31,423	30,107	61,886	57,074
Income from operations	3,749	20,784	7,074	41,348
Other income (expense):
Interest expense, net	(15)	(48)	(106)	(141)
Other income (expense), net	828	(166)	1,098	186
Total other income (expense), net	813	(214)	992	45
Income before income taxes	4,562	20,570	8,066	41,393
Provision for income taxes	632	2,895	1,163	7,337
Net income	$ 3,930	$ 17,675	$ 6,903	$ 34,056
Net income per share:
Basic (in dollars per share)	$ 0.16	$ 0.74	$ 0.28	$ 1.42
Diluted (in dollars per share)	$ 0.16	$ 0.72	$ 0.28	$ 1.39
Weighted average shares used in per share calculation:
Basic (in shares)	24,525	23,953	24,530	24,008
Diluted (in shares)	24,843	24,442	24,850	24,488
Products [Member]
Net revenues:
Total net revenues	$ 52,541	$ 76,704	$ 106,396	$ 147,723
Costs of net revenues:
Cost of products and service	24,294	31,235	50,193	59,828
Service [Member]
Net revenues:
Total net revenues	15,079	11,900	28,324	23,194
Costs of net revenues:
Cost of products and service	$ 7,683	$ 6,443	$ 14,631	$ 12,597