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Revenue - Composition of Revenue (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net revenue	$ 30,383,132	$ 65,658,748	$ 88,033,558	$ 123,346,302
Commercial Advertising [Member]
Disaggregation of Revenue [Line Items]
Net revenue	24,202,267	57,375,821	71,630,987	106,957,086
Digital Advertising [Member]
Disaggregation of Revenue [Line Items]
Net revenue	4,208,340	4,948,181	9,565,013	8,455,130
Other [Member]
Disaggregation of Revenue [Line Items]
Net revenue	$ 1,972,525	$ 3,334,746	$ 6,837,558	$ 7,934,086

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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.

+ References

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