POWER OF ATTORNEY

       KNOW ALL MEN BY THESE PRESENT, that I, GEORGE SOROS, hereby make,
constitute and appoint each of MARYANN CANFIELD, JODYE ANZALOTTA, JAY
SCHOENFARBER THOMAS O'GRADY, REGAN O'NEILL and ROBERT SOROS, acting
individually, as my agent and attorney-in-fact for the purpose of executing in
my name, (a) in my personal capacity or (b) in my capacity as Chairman of,
member of or in other capacities with Soros Fund Management LLC ("SFM LLC") and
each of its affiliates or entities advised by me or SFM LLC, all documents,
certificates, instruments, statements, filings and agreements ("documents") to
be filed with or delivered to any foreign or domestic governmental or regulatory
body or required or requested by any other person or entity pursuant to any
legal or regulatory requirement relating to the acquisition, ownership,
management or disposition of securities, futures contracts or other investments,
and any other documents relating or ancillary thereto, including without
limitation all documents relating to filings with the Commodities Futures
Trading Commission and National Futures Association, the United States
Securities and Exchange Commission (the "SEC") pursuant to the Securities Act of
1933 or the Securities Exchange Act of 1934 (the "Act") and the rules and
regulations promulgated thereunder, including all documents relating to the
beneficial ownership of securities required to be filed with the SEC pursuant to
Section 13(d) or Section 16(a) of the Act and any information statements on Form
13F required to be filed with the SEC pursuant to Section 13(f) of the Act.

       All past acts of these attorneys-in-fact in furtherance of the foregoing
are hereby ratified and confirmed.

       Execution of this power of attorney revokes that certain Power of
Attorney dated as of the 26th day of June, 2009 with respect to the same matters
addressed above.

       This power of attorney shall be valid from the date hereof until revoked
by me.

       IN WITNESS WHEREOF, I have executed this instrument as of the 24th day of
November, 2015.

                                  GEORGE SOROS

                                 /s/ Daniel Eule
                                 ---------------
                                 Daniel Eule
                                 Attorney-in-Fact for George Soros