CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Total Net Revenue	[1]	$ 115,725	$ 100,616	$ 280,696	$ 289,903
Total cost of revenue		40,185	50,514	119,379	141,015
Total gross profit		75,540	50,102	161,317	148,888
Operating expenses:
Research and development		20,197	22,251	62,911	67,250
Selling, general and administrative		31,148	29,723	88,478	88,874
Amortization of intangibles		785	792	2,357	2,396
Restructuring and related charges		861	987	1,194	2,704
Total operating expenses		52,991	53,753	154,940	161,224
Income (loss) from operations		22,549	(3,651)	6,377	(12,336)
Interest expense, net		(3,000)	(2,872)	(8,862)	(8,492)
Loss on debt extinguishment		(5,695)		(5,695)	0
Other expense, net		(1,594)	(365)	(2,333)	(698)
Income (loss) before income taxes		12,260	(6,888)	(10,513)	(21,526)
Provision for income taxes		603	870	981	2,839
Net income (loss)		$ 11,657	$ (7,758)	$ (11,494)	$ (24,365)
Net income (loss) per share:
Basic		$ 0.13	$ (0.09)	$ (0.13)	$ (0.29)
Diluted		$ 0.12	$ (0.09)	$ (0.13)	$ (0.29)
Shares used in per share calculation:
Basic		89,964	86,321	89,030	85,188
Diluted		97,596	86,321	89,030	85,188
Appliance & Integration [Member]
Total Net Revenue		$ 83,082	$ 71,965	$ 189,864	$ 204,385
Total cost of revenue		26,812	38,945	83,178	106,183
SaaS & Service [Member]
Total Net Revenue		32,643	28,651	90,832	85,518
Total cost of revenue		$ 13,373	$ 11,569	$ 36,201	$ 34,832

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