Exhibit 99.1 Form 4 Joint Filer Information Name: VIEX Opportunities Fund, LP - Series One Address: 150 East 52nd Street 3rd Floor New York, NY 10022 Date of Event Requiring Statement: 06/18/19 Name: VIEX GP, LLC Address: 150 East 52nd Street 3rd Floor New York, NY 10022 Date of Event Requiring Statement: 06/18/19 Name: VIEX Special Opportunities Fund II, LP Address: 150 East 52nd Street 3rd Floor New York, NY 10022 Date of Event Requiring Statement: 06/18/19 Name: VIEX Special Opportunities GP II, LLC Address: 150 East 52nd Street 3rd Floor New York, NY 10022 Date of Event Requiring Statement: 06/18/19 Name: VIEX Capital Advisors, LLC Address: 150 East 52nd Street 3rd Floor New York, NY 10022 Date of Event Requiring Statement: 06/18/19