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Commitments and Contingencies - Summary of Lease Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Commitments And Contingencies Disclosure [Abstract]    
Operating lease costs $ 350,100 $ 351,500
Variable lease costs 111,200 100,500
Cash paid $ 461,300 $ 452,000.0