Related Parties	9 Months Ended
Sep. 30, 2019
Related Parties
Related Parties	14. Related Parties In April 2013, the Company entered into a services agreement with Flagship Ventures Management, Inc. (“Flagship”), an affiliate of one of its principal stockholders, to provide general and administrative services to the Company, including certain consulting services and the provision of employee health and dental benefit plans for the Company’s employees. The Company recorded general and administrative expense for services received under this agreement of $0.3 million and $0.8 million during the three and nine months ended September 30, 2018, respectively. The Company made cash payments of $0.4 million and $0.8 million for the three and nine months ended September 30, 2018, respectively, related to these services. The Company did not receive services under this agreement during the three and nine months ended September 30, 2019. As of September 30, 2019, the Company had no amounts payable to Flagship for costs related to the services agreement. In February 2019, the Company entered into a sublease agreement with a related party to sublease all office and laboratory space under one of the Company’s operating leases in Cambridge, Massachusetts. The term of the sublease agreement commenced in February 2019 and expires at the end of the Company’s lease agreement with the landlord in September 2021, with no option to extend (see Note 12). Under this agreement, the Company recorded other income of $0.3 million and $0.6 million during the three and nine months ended September 30, 2019, respectively. The Company received cash payments of $0.1 million and $0.4 million during the three and nine months ended September 30, 2019. As of September 30, 2019, the Company recorded accounts receivable of $0.1 million under this agreement.

14. Related Parties

In April 2013, the Company entered into a services agreement with Flagship Ventures Management, Inc. (“Flagship”), an affiliate of one of its principal stockholders, to provide general and administrative services to the Company, including certain consulting services and the provision of employee health and dental benefit plans for the Company’s employees. The Company recorded general and administrative expense for services received under this agreement of $0.3 million and $0.8 million during the three and nine months ended September 30, 2018, respectively. The Company made cash payments of $0.4 million and $0.8 million for the three and nine months ended September 30, 2018, respectively, related to these services. The Company did not receive services under this agreement during the three and nine months ended September 30, 2019. As of September 30, 2019, the Company had no amounts payable to Flagship for costs related to the services agreement.

In February 2019, the Company entered into a sublease agreement with a related party to sublease all office and laboratory space under one of the Company’s operating leases in Cambridge, Massachusetts. The term of the sublease agreement commenced in February 2019 and expires at the end of the Company’s lease agreement with the landlord in September 2021, with no option to extend (see Note 12). Under this agreement, the Company recorded other income of $0.3 million and $0.6 million during the three and nine months ended September 30, 2019, respectively. The Company received cash payments of $0.1 million and $0.4 million during the three and nine months ended September 30, 2019. As of September 30, 2019, the Company recorded accounts receivable of $0.1 million under this agreement.