Exhibit 99.2




The undersigned hereby appoints Stephen D. Baksa his true and lawful attorney-in fact and agent to execute and file with the Securities and Exchange Commission any Schedule 13D, Schedule 13G, Form 3, Form 4, Form 5, settlement agreement, amendments to any of the foregoing and related documentation which may be required to be filed in his individual capacity as a result of the undersigned’s beneficial ownership of, or participation in a group with respect to, securities directly or indirectly beneficially owned by the undersigned or any of his affiliates, and granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing which he might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent may lawfully do or cause to be done by virtue hereof. The authority of Stephen D. Baksa under this Power of Attorney shall continue with respect to the undersigned until revoked in writing.


Date: November 13, 2017  
/s/ Joseph T. Lukens  
Joseph T. Lukens