CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 27, 2020	Mar. 29, 2019
Total net revenue	[1]	$ 78,417	$ 80,106
Total cost of revenue		41,679	38,257
Total gross profit		36,738	41,849
Operating expenses:
Research and development		22,123	21,401
Selling, general and administrative		31,218	28,011
Amortization of intangibles		770	788
Restructuring and related charges		676	57
Total operating expenses		54,787	50,257
Loss from operations		(18,049)	(8,408)
Interest expense, net		(2,903)	(2,906)
Other expense, net		(273)	(311)
Loss before income taxes		(21,225)	(11,625)
Provision for (benefit from) income taxes		729	(319)
Net loss		$ (21,954)	$ (11,306)
Net loss per share:
Basic and Diluted		$ (0.23)	$ (0.13)
Shares used in per share calculation:
Basic and Diluted		95,575	88,165
Appliance & Integration [Member]
Total net revenue		$ 47,752	$ 52,365
Total cost of revenue		26,287	27,054
SaaS & Service [Member]
Total net revenue		30,665	27,741
Total cost of revenue		$ 15,392	$ 11,203

[1] Revenue is attributed to countries based on the location of the customer.