Intangible Assets - Additional Information (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)
Finite Lived Intangible Assets [Line Items]
Subsequent impairment of the underlying assets		$ 0
Expected annual amortization expense for 2020	$ 100,000	100,000
Expected annual amortization expense for 2021	200,000	200,000
Expected annual amortization expense for 2022	200,000	200,000
Expected annual amortization expense for 2023	200,000	200,000
Expected annual amortization expense for 2024	200,000	200,000
Expected annual amortization expense for 2025	200,000	200,000
Expected annual amortization expense for 2026	200,000	$ 200,000
COVID-19 [Member]
Finite Lived Intangible Assets [Line Items]
Impairment charge	$ 0