Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock, $0.01 par value^F1,F2,F3	Dec 7, 2017	S	118,619	$3.4968	D	1,831,162	I	By: VIEX Opportunities Fund, LP - Series One
Common Stock, $0.01 par value^F1,F2,F3	Dec 7, 2017	S	207,724	$3.5048	D	1,623,438	I	By: VIEX Opportunities Fund, LP - Series One
Common Stock, $0.01 par value^F1,F2,F4	Dec 7, 2017	S	117,183	$3.4968	D	1,808,992	I	By: VIEX Special Opportunities Fund II, LP
Common Stock, $0.01 par value^F1,F2,F4	Dec 7, 2017	S	205,209	$3.5048	D	1,603,783	I	By: VIEX Special Opportunities Fund II, LP

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP ("VIEX Opportunities"), VIEXSpecial Opportunities Fund II, LP ("VSO II"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Capital Advisors, LLC ("VIEXCapital"), and Eric Singer (collectively, the "Reporting Persons").
F2The Reporting Persons are filing this report because each of the Reporting Persons is a member of a Section 13(d) group, disclosed in a Schedule 13D filed on behalf of the Reporting Persons, as it may be amended, which beneficially owns in the aggregate more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the shares of Common Stock reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such shares of Common Stock for purposes of Section 16 or for any other purpose.
F3Shares of Common Stock beneficially owned directly by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by Series One. VIEX Capital, as the investment manager of Series One, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by Series One. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by Series One.
F4Shares of Common Stock beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by VSO II. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the shares of Common Stock beneficially owned by VSO II.