Related Parties	12 Months Ended
Dec. 31, 2018
Related Parties
Related Parties	Note 21—Related Parties The Company leases certain office space from certain of its principal shareholders, including a director and executive officer and a former member of the Company’s Board of Directors, and members of their immediate families, which have expiration dates ranging from 2019 to 2020. Total rent expense under these leases was $1.2 million, $3.5 million and $3.9 million for each of the years ended December 31, 2018, 2017 and 2016, respectively. During the years ended December 31, 2018, 2017 and 2016, the Company recorded revenue of $2.9 million, $2.6 million and $1.1 million, respectively, arising from commercial transactions with a life sciences company in which a member of the Company’s Board of Directors is Chairman and Chief Executive Officer. During the year ended December 31, 2018, the Company recorded revenue of $0.6 million from commercial transactions with a hospital in which a member of the Company’s Board of Directors serves on the Board of Trustees.

Related Parties

12 Months Ended

Dec. 31, 2018

Note 21—Related Parties

The Company leases certain office space from certain of its principal shareholders, including a director and executive officer and a former member of the Company’s Board of Directors, and members of their immediate families, which have expiration dates ranging from 2019 to 2020. Total rent expense under these leases was $1.2 million, $3.5 million and $3.9 million for each of the years ended December 31, 2018, 2017 and 2016, respectively.

During the years ended December 31, 2018, 2017 and 2016, the Company recorded revenue of $2.9 million, $2.6 million and $1.1 million, respectively, arising from commercial transactions with a life sciences company in which a member of the Company’s Board of Directors is Chairman and Chief Executive Officer.

During the year ended December 31, 2018, the Company recorded revenue of $0.6 million from commercial transactions with a hospital in which a member of the Company’s Board of Directors serves on the Board of Trustees.