Type	Name	Date
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	11/24/2021
Underwriting agreement	UNDERWRITING AGREEMENT	05/21/2021
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	12/17/2020
Registration rights agreement	REGISTRATION RIGHTS AGREEMENT	09/11/2017
Underwriting agreement	Underwriting Agreement	05/24/2013
Underwriting agreement	Underwriting Agreement	02/13/2012