Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2,F7	Jan 2, 2015	S	88,000	$10.8319	D	1,238,826	I	See Footnote
Common Stock^F3,F4,F7	Jan 5, 2015	S	164,919	$10.5389	D	1,073,907	I	See Footnote
Common Stock^F5,F6,F7	Jan 6, 2015	S	20,941	$9.9011	D	1,052,966	I	See Footnote

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1Rho Ventures V, L.P. ("RV V") sold 80,898 shares and Rho Ventures V Affiliates, L.L.C. ("RV V Affiliates") sold 7,102 shares.
F2Consists of 1,138,840 shares held by RV V and 99,986 shares held by RV V Affiliates.
F3RV V sold 151,608 shares and RV V Affiliates sold 13,311 shares.
F4Consists of 987,232 shares held by RV V and 86,675 shares held by RV V Affiliates.
F5RV V sold 19,251 shares and RV V Affiliates sold 1,690 shares.
F6Consists of 967,981 shares held by RV V and 84,985 shares held by RV V Affiliates.
F7RMV V, L.L.C. ("RMV") is the general partner of RV V and the managing member of RV V Affiliates. Rho Capital Partners LLC ("RCP LLC") is the managing member of RMV. Each of RMV and RCP LLC disclaim beneficial ownership of the reportable securities and this report shall not be deemed an admission that RMV or RCP LLC is the beneficial owner of such securities, except to the extent of its pecuniary interest therein. Habib Kairouz, Mark Leschly and Joshua Ruch are managing members of RCP LLC. Each of Habib Kairouz, Mark Leschly and Joshua Ruch disclaim beneficial ownership of the reportable securities and this report shall not be deemed an admission that any of them is the beneficial owner of such securities, except to the extent of his pecuniary interest therein.