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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue	$ 15,420	$ 9,525	$ 28,984	$ 16,531
Cost of revenue	7,720	4,360	15,050	8,054
Gross profit	7,700	5,165	13,934	8,477
Operating expenses:
Research and development	9,881	8,891	19,318	18,041
Selling, general and administrative	14,437	14,145	28,044	27,828
Total operating expenses	24,318	23,036	47,362	45,869
Loss from operations	(12,571)	(16,204)	(25,926)	(34,297)
Non-operating (expense) income, net:
Foreign exchange loss	(138)	(14)	(30)	(59)
Interest expense	(958)	(501)	(1,873)	(1,032)
Other income, net	444	3,512	775	3,618
Total non-operating (expense) income, net	(652)	2,997	(1,128)	2,527
Loss before income taxes	(13,223)	(13,207)	(27,054)	(31,770)
Provision for income taxes	59	3,876	113	3,911
Net loss	$ (13,282)	$ (17,083)	$ (27,167)	$ (35,681)
Net loss per share:
Basic	$ (0.10)	$ (0.16)	$ (0.21)	$ (0.34)
Diluted	$ (0.10)	$ (0.16)	$ (0.21)	$ (0.34)
Weighted average shares outstanding used for calculating net loss per share:
Basic	131,352	105,044	128,101	104,308
Diluted	131,352	105,044	128,101	104,308
Product
Revenue	$ 15,420	$ 9,525	$ 28,984	$ 16,531
Government Contract
Revenue	$ 4,047	$ 1,667	$ 7,502	$ 3,095

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