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Intangible Assets - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2020
Sep. 30, 2020
Finite Lived Intangible Assets [Line Items]    
Subsequent impairment of the underlying assets   $ 0
Expected annual amortization expense for 2020   100,000
Expected annual amortization expense for 2021   200,000
Expected annual amortization expense for 2022   200,000
Expected annual amortization expense for 2023   200,000
Expected annual amortization expense for 2024   200,000
Expected annual amortization expense for 2025   200,000
Expected annual amortization expense for 2026   $ 200,000
COVID-19 [Member]    
Finite Lived Intangible Assets [Line Items]    
Impairment charge $ 0