Annual report pursuant to Section 13 and 15(d)

Equity Transactions - Additional Information (Detail)

v3.20.1
Equity Transactions - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Aug. 09, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Non-cash stock-based compensation expense related to additional paid-in capital $ 1,500 $ 1,460 $ 543  
Scenario, Forecast [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Expected dividend payments       $ 2,700