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Revenue - Composition of Revenue (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Net revenue	$ 241,426,308	$ 206,143,861
Audio [Member]
Disaggregation of Revenue [Line Items]
Net revenue	206,460,883	181,034,169
Digital [Member]
Disaggregation of Revenue [Line Items]
Net revenue	32,743,850	21,605,742
Other [Member]
Disaggregation of Revenue [Line Items]
Net revenue	$ 2,221,575	$ 3,503,950

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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