Exhibit 99.1

JOINT FILING AGREEMENT

Pursuant to Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned agree that the Statement on Schedule 13G to which this exhibit is attached is filed on behalf of each of them.

January 14, 2021

(Date)

Electrum Strategic Opportunities Fund II L.P.
By:	Electrum Strategic Opportunities Fund II GP L.P., its general partner
By:	ESOF II GP Ltd., its general partner
By:	/s/ Michael H. Williams
Name:	Michael H. Williams
Title:	Authorized Person
Electrum Strategic Opportunities Fund II GP L.P.
By:	ESOF II GP Ltd., its general partner
By:	/s/ Michael H. Williams
Name:	Michael H. Williams
Title:	Authorized Person
ESOF II GP Ltd.
By:	/s/ Michael H. Williams
Name:	Michael H. Williams
Title:	Authorized Person
The Electrum Group LLC
By:	/s/ Michael H. Williams
Name:	Michael H. Williams
Title:	Authorized Person