Type	Name	Date
Underwriting agreement	UNDERWRITING AGREEMENT	06/09/2021
Underwriting agreement	UNDERWRITING AGREEMENT	12/09/2020
Underwriting agreement	UNDERWRITING AGREEMENT	12/26/2019
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	08/16/2019
Securities purchase agreement	Securities Purchase Agreement	08/31/2018
Securities purchase agreement	Securities Purchase Agreement	06/29/2018
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	01/04/2018
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	08/24/2017
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	08/18/2017
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	07/27/2017
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	03/10/2017