Litigation (Tables)

3 Months Ended

Mar. 31, 2017

Litigation

Schedule of patent expiration dates

U.S. Patent No.	Expiration Date
8,252,839	May 2024
9,050,311	May 2024
7,544,713	July 2024
7,417,070	July 2026
8,497,393	December 2028
8,747,897	October 2029
8,410,169	February 2030
8,349,892	January 2031