Type	Name	Date
Underwriting agreement	Underwriting Agreement	09/18/2019
Underwriting agreement	Underwriting Agreement	11/28/2018
Underwriting agreement	Underwriting Agreement	08/10/2016
Registration rights agreement	Registration Rights Agreement	01/07/2016
Underwriting agreement	Underwriting Agreement	01/07/2016
Underwriting agreement	Underwriting Agreement	03/05/2014
Underwriting agreement	Underwriting Agreement	05/15/2013
Securities purchase agreement	Securities Purchase Agreement	12/18/2012