XML 58 R47.htm IDEA: XBRL DOCUMENT v3.21.2
Stockholders' Equity - 2020 Equity Financing - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended
Feb. 29, 2020
Jun. 30, 2021
Dec. 31, 2020
Jun. 23, 2020
Jun. 22, 2020
Class Of Stock [Line Items]          
Common stock, shares authorized   300,000,000 300,000,000 300,000,000  
2020 Equity Financing [Member]          
Class Of Stock [Line Items]          
Common stock, shares authorized         150,000,000
2020 Equity Financing [Member] | Share Offering [Member]          
Class Of Stock [Line Items]          
Common stock issued 1,500,000        
Price per share $ 14.50        
Gross proceeds from issuance of common stock $ 21,750        
Share issuance costs $ 1,800