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Revenue - Summary of Revenue Disaggregated by Source (Detail) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation Of Revenue [Line Items]    
Total revenue $ 35,101,991 $ 25,331,814
Services [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenue 32,704,583 22,755,451
Product Sales and Other [Member]    
Disaggregation Of Revenue [Line Items]    
Total revenue $ 2,397,408 $ 2,576,363