Annual report pursuant to Section 13 and 15(d)

Mandatorily-Redeemable Preferred Stock (Detail)

v3.19.3.a.u2
Mandatorily-Redeemable Preferred Stock (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Aug. 31, 2016
Dec. 31, 2019
Dec. 31, 2018
Sale of Stock [Line Items]      
Common stock, shares issued (in shares)   20,936,658 17,891,340
Proceeds from issuance of preferred and common equity   $ 118,357 $ 74,417
Payments of legal costs   9,186 $ 4,186
Term preferred stock, fair value   $ 3,290  
Series A Preferred Stock      
Sale of Stock [Line Items]      
Preferred stock, dividend rate (as percent) 6.375%    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001 $ 0.001
Weighted Average Offering Price Per Share $ 25    
Proceeds from issuance of preferred and common equity $ 27,600    
Redemption price of redeemable preferred stock (in dollars per share)   $ 25.70 $ 25
Payments of legal costs $ 1,200    
Term preferred stock, fair value   $ 29,600  
Series A Preferred Stock | Preferred Stock      
Sale of Stock [Line Items]      
Common stock, shares issued (in shares) 1,150,000    
Proceeds from issuance of mandatorily-redeemable preferred stock   $ 28,800