F1This option shall vest ratably at a rate of 1/12th of the total number of shares granted on each monthly anniversary of the grant date, so long as the Reporting Person remains a member of the Board of Director of the Issuer.
F2Not applicable - This option was issued pursuant to the 2010 Equity Incentive Plan and in accordance with the the Issuer's Non-Employee Director Compensation Policy.
F3Includes Director Option to purchase 2,191 shares of Common Stock, which is held by Mr. Carano on behalf of Oak Investment Partners IX, Limited Partnership ("Oak IX"); Director Option to purchase 23 shares of Common Stock, which is held by Mr. Carano on behalf of Oak IX Affiliates Fund, Limited Partnership ("Oak IX Affiliates"); Director option to purchase 52 shares of Common Stock, which is held by Mr. Carano on behalf of Oak IX Affiliates Fund-A, Limited Partnership ("Oak IX Affiliates-A"); Director Options to purchase 5,038 shares of Common Stock, which is held by Mr. Carano on behalf of Oak Investment Partners X, Limited Partnership ("Oak X"); Director Option to purchase 81 shares of Common Stock, which is held by Mr. Carano on behalf of Oak X Affiliates Fund, Limited Partnership ("Oak X Affiliates"); and Director Options to purchase 136 shares of Common Stock, which is held by Mr. Carano on behalf of Oak Investment Partners XI, Limited Partnership ("Oak XI").
F4Includes 40,435 Director Options, which are held by Oak IX, Oak IX Affiliates, Oak IX Affiliates-A, Oak X, Oak X Affiliates, and Oak XI. Oak Associates IX, L.L.C. is the General Partner of Oak IX; Oak IX Affiliates, L.L.C. is the General Partner of Oak IX Affiliates and Oak IX Affiliates-A; Oak Associates X, L.L.C. is the General Partner of Oak X; Oak X Affiliates, L.L.C. is the General Partner of Oak X Affiliates; and Oak Associates XI, L.L.C. is the General Partner of Oak XI and may be deemed to beneficially own the reported securities.

Remarks

Bandel L. Carano is a Director of the Issuer. Mr. Carano is a Managing Member of Oak Associates IX, L.L.C., the General Partner of Oak IX; a Managing Member of Oak IX Affiliates, L.L.C., the General Partner of Oak IX Affiliates and Oak IX Affiliates-A; a Managing Member of Oak Associates X, L.L.C., the General Partner of Oak X; a Managing Member of Oak X Affiliates, L.L.C., the General Partner of Oak X Affiliates; and a Managing Member of Oak Associates XI, L.L.C., the General Partner of Oak XI. This Form 4 is being filed by Bandel L. Carano, Oak IX, Oak IX Affiliates, Oak IX Affiliates-A, Oak X, Oak X Affiliates, and Oak XI (collectively the "Reporting Persons"). Each Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of any securities (except to the extent of such Reporting Person's pecuniary interest in such securities) other than any securities reported herein as being directly owned by such Reporting Person, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of any such securities for purposes of Section 16 or for any other purpose.