Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.19.3
Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 25, 2018
Sep. 30, 2019
Sep. 30, 2018
Class Of Warrant Or Right [Line Items]      
Proceeds from public offering   $ 0 $ 48,061
Underwritten Public Offering      
Class Of Warrant Or Right [Line Items]      
Shares issued under public offering 9,430,000    
Shares issued, price per share $ 5.50    
Proceeds from public offering $ 48,100    
Over-Allotment Option      
Class Of Warrant Or Right [Line Items]      
Shares issued under public offering 1,230,000