Summary of significant accounting policies (Tables)

3 Months Ended

Mar. 31, 2020

Summary of significant accounting policies

Schedule of potentially dilutive securities excluded from calculation of diluted net loss per share

The following table sets forth the potentially dilutive securities that have been excluded from the calculation of diluted net loss per share because to include them would be anti‑dilutive (in common stock equivalent shares):

	Three months ended March 31,
	2020	2019
Series A convertible preferred stock	—	612,446
Series B convertible preferred stock	—	7,235,969
Series C convertible preferred stock	—	5,179,877
Options to purchase common stock	3,845,944	2,802,576
Total shares of common stock equivalents	3,845,944	15,830,868