F1This Form 4 is being filed by Ardsley Advisory Partners (the " Advisor") on behalf of itself and Ardsley Partners I (the "General Partner"), Ardsley Partners Renewable Energy Fund, L.P. (the "Renewable Energy Fund"). Ardsley Partners Fund II, L.P. (the "Fund II"), Ardsley Duckdive Fund, L.P. (the "Duckdive Fund") and Philip J. Hempleman ("Hempleman" and, together with the Advisor, the General Partner, the Renewable Energy Fund, the Fund II and the Duckdive Fund, the "Reporting Persons"). The General Partner serves as general partner to the Renewable Energy Fund and the Fund II. Hempleman is the Managing Partner of the Advisor and the General Partner and serves as the general partner to the Duckdive Fund.
F2The amount of 50,000 in Table I reflects the amount of common stock purchased by the Duckdive Fund in the transaction requiring the filing of this statement. In accordance with Instruction 4(b)(iv) of Form 4, the entire amount of the Issuer's securities held by the Reporting Persons is reported herein. Each of the General Partner, the Advisor and Hempleman, disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein, and this report shall not be deemed an admission that either the General Partner and the Advisor are the beneficial owner of such securities for purposes of Section 16 or for any other purposes.
F3Cont'd from Footnote 2: Hempleman is the Managing Partner of the General Partner and the Advisor and serves as the general partner to the Duckdive Fund and disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein, and this report shall not be deemed an admission that Hempleman is the beneficial owner of such securities for purposes of Section 16 or for any other purposes.