Quarterly report pursuant to Section 13 or 15(d)

Intangibles - Additional Information (Detail)

v3.20.2
Intangibles - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
May 18, 2015
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]          
Intangible assets, Fair Value $ 3,100,000        
Intangible assets, Useful life 14 years        
License agreement amortization expense   $ 100,000 $ 100,000 $ 200,000 $ 200,000
Impairment of intangible assets       $ 0