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Accounts Receivable - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Distributor
Receivables [Abstract]    
Number of wholesale distributors   3
Percentage of accounts receivable from major wholesale distributors 87.00% 87.00%
Percentage of gross sales from major wholesale distributors 83.00% 87.00%