Explanation of Responses:
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1)
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This amendment reduces the number of shares issuable on conversion of the Notes as described in footnotes 2, 4, 6, 8, 10, 12 below and the Underlying Securities in Column 7 due to acquisition of beneficial ownership of shares as reported on a Form 4 filed the same date as this Amendment on June 30, 2016.
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2)
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The number of shares issuable on conversion of all Notes is subject to a limit which varies over time depending on the Issuer's then-outstanding shares of Common Stock and any other acquisitions of beneficial ownership by a Reporting Owner during the preceding 12 months. Based on 30,070,750 shares outstanding on March 23, 2016, all of the Notes together when issued were convertible into a maximum of 388,783 shares. The Reporting Owner's Note when issued was convertible into a maximum of 60,547 shares.
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3)
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These securities are directly held by VantagePoint Venture Partners III (Q), L.P. VantagePoint Venture Associates III, L.L.C. is the general partner of VantagePoint Venture Partners III (Q), L.P. VantagePoint Venture Associates III, L.L.C. disclaims beneficial ownership of such securities except to the extent of its pecuniary interest in such securities. Alan E. Salzman, a managing member of VantagePoint Venture Associates III, L.L.C., disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interests therein.
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4)
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The number of shares issuable on conversion of all Notes is subject to a limit which varies over time depending on the Issuer's then-outstanding shares of Common Stock and any other acquisitions of beneficial ownership by a Reporting Owner during the preceding 12 months. Based on 30,070,750 shares outstanding on March 23, 2016, all of the Notes together when issued were convertible into a maximum of 388,783 shares. The Reporting Owner's Note when issued was convertible into a maximum of 7,372 shares.
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5)
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These securities are directly held by VantagePoint Venture Partners III, L.P. VantagePoint Venture Associates III, L.L.C. is the general partner of VantagePoint Venture Partners III, L.P. VantagePoint Venture Associates III, L.L.C. disclaims beneficial ownership of such securities except to the extent of its pecuniary interest in such securities. Alan E. Salzman, a managing member of VantagePoint Venture Associates III, L.L.C., disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interests therein.
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6)
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The number of shares issuable on conversion of all Notes is subject to a limit which varies over time depending on the Issuer's then-outstanding shares of Common Stock and any other acquisitions of beneficial ownership by a Reporting Owner during the preceding 12 months. Based on 30,070,750 shares outstanding on March 23, 2016, all of the Notes together when issued were convertible into a maximum of 388,783 shares. The Reporting Owner's Note when issued was convertible into a maximum of 262,019 shares.
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7)
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These securities are directly held by VantagePoint Venture Partners IV (Q), L.P. VantagePoint Venture Associates IV, L.L.C. is the general partner of VantagePoint Venture Partners IV (Q), L.P. VantagePoint Venture Associates IV, L.L.C. disclaims beneficial ownership of such securities except to the extent of its pecuniary interest in such securities. Alan E. Salzman, a managing member of VantagePoint Venture Associates IV, L.L.C., disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interests therein.
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8)
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The number of shares issuable on conversion of all Notes is subject to a limit which varies over time depending on the Issuer's then-outstanding shares of Common Stock and any other acquisitions of beneficial ownership by a Reporting Owner during the preceding 12 months. Based on 30,070,750 shares outstanding on March 23, 2016, all of the Notes together when issued were convertible into a maximum of 388,783 shares. The Reporting Owner's Note when issued was convertible into a maximum of 26,231 shares.
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9)
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These securities are directly held by VantagePoint Venture Partners IV, L.P. VantagePoint Venture Associates IV, L.L.C. is the general partner of VantagePoint Venture Partners IV, L.P. VantagePoint Venture Associates IV, L.L.C. disclaims beneficial ownership of such securities except to the extent of its pecuniary interest in such securities. Alan E. Salzman, a managing member of VantagePoint Venture Associates IV, L.L.C., disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interests therein.
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10)
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The number of shares issuable on conversion of all Notes is subject to a limit which varies over time depending on the Issuer's then-outstanding shares of Common Stock and any other acquisitions of beneficial ownership by a Reporting Owner during the preceding 12 months. Based on 30,070,750 shares outstanding on March 23, 2016, all of the Notes together when issued were convertible into a maximum of 388,783 shares. The Reporting Owner's Note when issued was convertible into a maximum of 955 shares.
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11)
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These securities are directly held by VantagePoint Venture Partners IV Principals Fund, L.P. VantagePoint Venture Associates IV, L.L.C. is the general partner of VantagePoint Venture Partners IV Principals Fund, L.P. VantagePoint Venture Associates IV, L.L.C. disclaims beneficial ownership of such securities except to the extent of its pecuniary interest in such securities. Alan E. Salzman, a managing member of VantagePoint Venture Associates IV, L.L.C., disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interests therein.
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12)
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The number of shares issuable on conversion of all Notes is subject to a limit which varies over time depending on the Issuer's then-outstanding shares of Common Stock and any other acquisitions of beneficial ownership by a Reporting Owner during the preceding 12 months. Based on 30,070,750 shares outstanding on March 23, 2016, all of the Notes together when issued were convertible into a maximum of 388,783 shares. The Reporting Owner's Note when issued was convertible into a maximum of 31,660 shares.
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13)
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These securities are directly held by VantagePoint Venture Partners 2006 (Q), L.P. VantagePoint Venture Associates 2006, L.L.C. is the general partner of VantagePoint Venture Partners 2006 (Q), L.P. VantagePoint Venture Associates 2006, L.L.C. disclaims beneficial ownership of such securities except to the extent of its pecuniary interest in such securities. Alan E. Salzman, a managing member of VantagePoint Venture Associates 2006, L.L.C., disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interests therein.
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