Common stock and preferred stock (Tables)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Summary of Future Issuance of Common Stock Shares

The Company has reserved for future issuance the following number of shares of common stock (in thousands):

	December 31, 2014
Options to purchase common stock		3,652
Restricted stock units		179
2013 Stock Option and Incentive Plan		465
Warrants to purchase common stock		177
Employee Stock Purchase Plan		238
Acquisition holdback (Note 12)		94
		4,805