POWER OF ATTORNEY

For Executing Forms 3, 4 and 5



The undersigned hereby constitutes and appoints each of Matthew

Boyle, Paul Farquhar, colleen Hamill, and Matthew Dallett,

signing singly, his true and lawful attorney-in-fact to:



(1) prepare, execute in the undersigned's name and on the

undersigned's behalf, and submit to the U.S. Securities and

Exchange Commission (the "SEC") a Form ID, including amendments

thereto, authentication documents, any other documents necessary

or appropriate to obtain codes and passwords enabling the

undersigned to make electronic filings with the SEC of reports

required by Section 16(a) of the Securities Exchange Act of

1934 or any rule or regulation of the SEC;



(2) execute for and on behalf of the undersigned Forms 3, 4

and 5 in accordance with Section 16(a) of the Securities

Exchange Act of 1934 and the rules thereunder;



(3) do and perform any and all acts for and on behalf of the

undersigned which may be necessary or desirable to complete the

execution of any such Form 3, 4 and 5 and the timely filing of such

form with the United States Securities and Exchange Commission and

any other authority; and



(4) take any other action of any type whatsoever in connection

with the foregoing which, in the opinion of such attorney-in-fact, may

be of benefit to, in the best interest of, or legally required by, the

undersigned, it being understood that the documents executed by

such attorney-in-fact on behalf of the undersigned pursuant to this

Power of Attorney shall be in such form and shall contain such terms

and conditions as such attorney-in-fact may approve in his or her

discretion.



The undersigned hereby grants to each such attorney-in-fact full

power and authority to do and perform all and every act and thing

whatsoever requisite, necessary, and proper to be done in the exercise

of any of the rights and powers herein granted, as fully to all intents

and purposes as such attorney-in-fact might or could do if personally

present, with full power of substitution or revocation, hereby

ratifying and confirming all that such attorney-in-fact, or his or her

substitute or substitutes, shall lawfully do or cause to be done by

virtue of this power of attorney and the rights and powers herein

granted.  The undersigned acknowledges that the foregoing

attorneys-in-fact, in serving in such capacity at the request of the

undersigned, are not assuming any of the undersigned's

responsibilities to comply with Section 16 of the Securities

Exchange Act of 1934.



IN WITNESS WHEREOF, the undersigned has executed this Power of

Attorney as of March 6, 2017.



Signed: /s/ Matthew Goldfarb

 Matthew Goldfarb