Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Details)

v3.20.1
Subsequent Events - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Feb. 04, 2020
Dec. 31, 2018
Subsequent Event [Line Items]    
Net proceeds from the public offering   $ 77,695
Underwritten Public Offering | Subsequent Event    
Subsequent Event [Line Items]    
Common stock, shares, issued 18,965,385  
Pre funded warrants to purchase shares of common stock 2,884,615  
Common stock, shares issued, price per share $ 2.60  
Warrant issue price per share $ 2.599  
Net proceeds from the public offering $ 53,300  
Underwritten Public Offering | Subsequent Event | Existing Stockholder, Morningside Ventures and certain officers and directors    
Subsequent Event [Line Items]    
Net proceeds from the public offering $ 22,900