Type	Name	Date
Underwriting agreement	Underwriting Agreement	01/08/2021
Underwriting agreement	Underwriting Agreement	09/13/2019
Underwriting agreement	Underwriting Agreement	09/21/2018
Underwriting agreement	Underwriting Agreement	12/14/2017
Registration rights agreement	Registration Rights Agreement, by and among the Company and the Purchasers	11/22/2016
Securities purchase agreement	Securities Purchase Agreement, by and among the Company and the Purchasers	11/22/2016
Securities purchase agreement	Securities Purchase Agreement, by and among the Company and the Purchasers	08/08/2016
Registration rights agreement	Registration Rights Agreement, by and among the Company and the Purchasers	08/08/2016
Underwriting agreement	Underwriting Agreement	05/21/2015

Type	Name	Date
Other	Offer Letter between the Company and Edward J. Dulac III	08/19/2020