Related party transactions	6 Months Ended
Jun. 30, 2020
Related party transactions
Related party transactions	17. Related party transactions The Company entered into the License Agreement for certain intellectual property with Tufts (see Note 11). Tufts is a related party to the Company due to Tufts’ equity ownership in the Company and because a member of the Company’s Board of Directors was affiliated with Tufts. During the three and six months ended June 30, 2020 and the three and six months ended June 30, 2019, the Company recorded royalty expense of $0.2 million, $0.4 million, $0.2 million and $0.4 million, respectively, in cost of product revenue on the consolidated statements of operations. During the year ended December 31, 2017, Harvard University became a related party because a member of the Company’s Board of Directors is affiliated with Harvard University. Revenue recorded from sales to Harvard University were less than $0.1 million for each of the three and six months ended June 30, 2020 and 2019.

Related party transactions

6 Months Ended

Jun. 30, 2020

17. Related party transactions

The Company entered into the License Agreement for certain intellectual property with Tufts (see Note 11). Tufts is a related party to the Company due to Tufts’ equity ownership in the Company and because a member of the Company’s Board of Directors was affiliated with Tufts. During the three and six months ended June 30, 2020 and the three and six months ended June 30, 2019, the Company recorded royalty expense of $0.2 million, $0.4 million, $0.2 million and $0.4 million, respectively, in cost of product revenue on the consolidated statements of operations.

During the year ended December 31, 2017, Harvard University became a related party because a member of the Company’s Board of Directors is affiliated with Harvard University. Revenue recorded from sales to Harvard University were less than $0.1 million for each of the three and six months ended June 30, 2020 and 2019.