Common stock and preferred stock (Tables)

12 Months Ended

Dec. 31, 2016

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,
	2016		2015
Options to purchase common stock		3,735		3,532
Restricted stock units		263		148
2013 Stock Option and Incentive Plan		1,226		565
2013 Employee Stock Purchase Plan		209		227
		5,433		4,472