Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.19.2
Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
Mar. 08, 2019
Feb. 01, 2018
Jun. 30, 2019
Mar. 11, 2019
Dec. 31, 2018
Equity [Abstract]          
Common stock, shares issued 8,000,000 13,340,000 68,701,043 1,200,000 59,456,493
Common stock offering price $ 12.50 $ 10.80      
Net proceeds from public offering $ 107.7 $ 135.5