Related Parties	12 Months Ended
Dec. 31, 2017
Related Parties
Related Parties	Note 20—Related Parties The Company leases certain office space from certain of its principal shareholders, including a director and executive officer and another member of the Company's Board of Directors, and members of their immediate families, which have expiration dates ranging from 2018 to 2020. Total rent expense under these leases was $3.5 million, $3.9 million and $1.8 million for each of the years ended December 31, 2017, 2016 and 2015, respectively. During the years ended December 31, 2017, 2016 and 2015, the Company recorded revenue of $2.6 million, $1.1 million and $0.7 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, 2016 and 2015, the Company recorded revenue of $0.2 million and $0.5 million, respectively, from commercial transactions with a thermal analysis company in which one of the former members of its Board of Directors serves as a consultant.

Related Parties

12 Months Ended

Dec. 31, 2017

Note 20—Related Parties

The Company leases certain office space from certain of its principal shareholders, including a director and executive officer and another member of the Company's Board of Directors, and members of their immediate families, which have expiration dates ranging from 2018 to 2020. Total rent expense under these leases was $3.5 million, $3.9 million and $1.8 million for each of the years ended December 31, 2017, 2016 and 2015, respectively.

During the years ended December 31, 2017, 2016 and 2015, the Company recorded revenue of $2.6 million, $1.1 million and $0.7 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, 2016 and 2015, the Company recorded revenue of $0.2 million and $0.5 million, respectively, from commercial transactions with a thermal analysis company in which one of the former members of its Board of Directors serves as a consultant.