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Stock-Based Compensation - Restricted Stock Units - Service Based - Additional Information (Detail)
shares in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2020
shares
Feb. 29, 2020
shares
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Service Based Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock awards issued during the period | shares 47,539 153,694        
Stock award vesting term 47,539 service-based restricted stock awards were issued. Company issued to employees 153,694 service-based restricted stock awards under the LTIP that vest in three substantially equal annual increments commencing in 2021.        
Restricted shares vested grant date intrinsic value     $ 18 $ 32 $ 1,900 $ 2,200
Employee salary reduction percentage 0.10          
Vesting period 1 year          
Restricted stock issued against salary percentage 0.05          
Service Based Restricted Stock Units [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted shares vested grant date intrinsic value     $ 0 $ 0 $ 44 $ 30