Agreement Regarding the Joint Filing of Schedule 13G

Exhibit A

Agreement Regarding the Joint Filing of Schedule 13G

The undersigned hereby agree as follows:

(i) Each of them is individually eligible to use the Schedule 13G to which this Exhibit is attached, and such Schedule 13G is filed on behalf of each of them; and

(ii) Each of them is responsible for the timely filing of such Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate.

Dated: February 14, 2019

By:		/s/ Xxxxxxxxxxx X. Xxxxxxx
		Xxxxxxxxxxx X. Xxxxxxx
The Xxxxxxxxxxx X. Xxxxxxx Revocable Trust of 2006, u/d/t 05/15/06
By:		/s/ Xxxxxxxxxxx X. Xxxxxxx
		Xxxxxxxxxxx X. Xxxxxxx, as Trustee of The Xxxxxxxxxxx X. Xxxxxxx Revocable Trust of 2006, u/d/t 05/15/06
The Xxxxxxxxxxx X. Xxxxxxx Irrevocable GST Trust of 2012, u/d/t 11/08/12
By:		/s/ Xxxxxxxx X. Xxxxxxx
		Xxxxxxxx X. Xxxxxxx, as Trustee of The Xxxxxxxxxxx X. Xxxxxxx Irrevocable GST Trust of 2012, u/d/t 11/08/12
By:		/s/ Xxxxxxx X. Xxxx
		Xxxxxxx X. Xxxx, as Trustee of The Xxxxxxxxxxx X. Xxxxxxx Irrevocable GST Trust of 2012, u/d/t 11/08/12

The Xxxxxxxxxxx X. Xxxxxxx GRAT II of 2018 u/d/t October 15, 2018
By:		/s/ Xxxxxxxxxxx X. Xxxxxxx
		Xxxxxxxxxxx X. Xxxxxxx, as Trustee of The Xxxxxxxxxxx X. Xxxxxxx XXXX XX of 2018 u/d/t October 15, 2018