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Net Loss Per Common Share (Tables)

12 Months Ended

Dec. 31, 2015

Common Stock Excluded from Calculation of Diluted Net Loss Per Share

Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in thousands):

	December 31,
	2015		2014		2013
Options to purchase common stock		1,665		1,211		865
Common stock subject to repurchase		—		—		1
Convertible preferred stock		—		—		7,689
Total		1,665		1,211		8,555