Annual report pursuant to Section 13 and 15(d)

Equity Transactions - Additional Information (Detail)

v3.19.1
Equity Transactions - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
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 $ 543 $ 1,721  
Scenario, Forecast [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Expected dividend payments     $ 6,800