Summary of Significant Accounting Policies - Schedule of Common Stock Equivalents Excluded from the Calculation of Diluted Net Loss Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Anti-dilutive securities
Total shares excluded from diluted net loss per share applicable to common stockholders	12,193,144	7,852,873	3,732,643
Stock options
Anti-dilutive securities
Total shares excluded from diluted net loss per share applicable to common stockholders	5,468,605	4,618,421	3,732,643
Unvested Restricted Stock Units
Anti-dilutive securities
Total shares excluded from diluted net loss per share applicable to common stockholders	1,734,383	1,116,358
Warrants
Anti-dilutive securities
Total shares excluded from diluted net loss per share applicable to common stockholders	4,990,156	2,118,094