Net loss per share (Tables)

6 Months Ended

Jun. 30, 2015

Net loss per share

Potentially dilutive securities not included in the calculation of dilutive EPS

	June 30,	June 30,
	2015	2014
Series A Redeemable Convertible Preferred Stock (as converted)	487,494	487,494
Series B Redeemable Convertible Preferred Stock (as converted)	1,297,100	1,297,100
Series B-1 Redeemable Convertible Preferred Stock (as converted)	2,275,733	2,275,733
Series C Redeemable Convertible Preferred Stock (as converted)	4,803,492	3,022,306
Series C Redeemable Convertible Preferred Stock Warrants (as converted)	819,650	25,000
Common Stock Warrants (as converted)	337,133	337,133
Stock options	776,910	404,175