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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating expenses:
Research and development	$ 27,286	$ 16,175	$ 43,378	$ 30,679
General and administrative	4,774	4,082	10,141	7,669
Sales and marketing	11,006	2,757	22,859	5,026
Total operating expenses	43,066	23,014	76,378	43,374
Loss from operations	(43,066)	(23,014)	(76,378)	(43,374)
Interest expense, net	(160)	(93)	(293)	(303)
Net loss	(43,226)	(23,107)	(76,671)	(43,677)
Other comprehensive income (loss):
Unrealized gains (losses) on short-term investments	(2)		39
Comprehensive loss	$ (43,228)	$ (23,107)	$ (76,632)	$ (43,677)
Basic and diluted net loss per share (in dollars per share)	$ (1.17)	$ (0.74)	$ (2.09)	$ (1.45)
Shares used in computing basic and diluted net loss per share (in shares)	37,048	31,035	36,639	30,218

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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