Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity Public Offering (Details)

v3.20.4
Stockholders' Equity Public Offering (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Mar. 22, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Mar. 21, 2019
Class of Stock [Line Items]          
Number of shares of stock issued during period (in shares)       0  
Proceeds from issuance of common stock, net of offering costs $ 284,500 $ 372 $ 336,253 $ 215  
Issuance costs incurred in common stock offering $ 300        
Common Stock [Member]          
Class of Stock [Line Items]          
Number of shares of stock issued during period (in shares) 18,000,000 61,225 24,439,436 72,616,483  
Price per share of common stock issued during period (in usd per share)         $ 13.76
Over-Allotment Option [Member] | Common Stock [Member]          
Class of Stock [Line Items]          
Number of shares of stock issued during period (in shares) 2,700,000