Related Party Transactions	12 Months Ended
Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	15. Related Party Transactions UHN In connection with the Company’s entry into a license agreement with UHN on January 27, 2016, the Company issued UHN 1,161,665 shares of its common stock. Upon the closing of the IPO, as UHN’s fully-diluted percentage ownership of the Company was reduced within a range of specified percentages, the Company was obligated to pay UHN an amount of $2,000, which was paid in July 2018. See Note 3 for further discussion on the accounting treatment for this provision. For the years ended December 31, 2019 and 2018, the Company recognized $821 and $56, respectively, of research and development expense related to the license agreements with UHN. Refer to Note 11 for additional information regarding the UHN license agreements. Others For the years ended December 31, 2019 and 2018, the Company recorded expenses of $1,451 and $348, respectively, related to a sublease to rent lab space, provided by an entity affiliated with a member of the board. For the years ended December 31, 2019 and 2018, the Company recorded expenses of $0 and $40, respectively, related to consulting services provided by an entity affiliated with an officer of the Company and a member of the Board.

Related Party Transactions

12 Months Ended

Dec. 31, 2019

15. Related Party Transactions

UHN

In connection with the Company’s entry into a license agreement with UHN on January 27, 2016, the Company issued UHN 1,161,665 shares of its common stock. Upon the closing of the IPO, as UHN’s fully-diluted percentage ownership of the Company was reduced within a range of specified percentages, the Company was obligated to pay UHN an amount of $2,000, which was paid in July 2018. See Note 3 for further discussion on the accounting treatment for this provision.

For the years ended December 31, 2019 and 2018, the Company recognized $821 and $56, respectively, of research and development expense related to the license agreements with UHN. Refer to Note 11 for additional information regarding the UHN license agreements.

Others

For the years ended December 31, 2019 and 2018, the Company recorded expenses of $1,451 and $348, respectively, related to a sublease to rent lab space, provided by an entity affiliated with a member of the board.

For the years ended December 31, 2019 and 2018, the Company recorded expenses of $0 and $40, respectively, related to consulting services provided by an entity affiliated with an officer of the Company and a member of the Board.