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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating expenses:
Research and development	$ 16,175	$ 14,279	$ 30,679	$ 25,907
General and administrative	6,839	4,512	12,695	10,206
Total operating expenses	23,014	18,791	43,374	36,113
Loss from operations	(23,014)	(18,791)	(43,374)	(36,113)
Other expense, net	(93)	(220)	(303)	(436)
Net loss	$ (23,107)	$ (19,011)	$ (43,677)	$ (36,549)
Basic and diluted net loss per share (in dollars per share)	$ (0.74)	$ (0.78)	$ (1.45)	$ (1.52)
Shares used in computing basic and diluted net loss per share (in shares)	31,035	24,266	30,218	23,989

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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