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Summary of Stock-based Compensation (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost of revenue	$ 23,595,819	$ 24,874,179	$ 51,804,191	$ 51,613,012
Selling and marketing	14,881,455	8,409,343	32,410,164	17,769,281
General and administrative	15,567,647	7,270,511	21,206,477	17,680,716
Total stock-based compensation			13,215,394	7,343,575
Stock Based Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost of revenue	1,753,631	1,166,984	3,197,569	2,293,193
Selling and marketing	1,586,798	1,067,384	2,638,155	2,135,984
General and administrative	4,775,953	1,549,087	7,379,670	2,914,398
Total costs charged to operations	8,116,382	3,783,455	13,215,394	7,343,575
Capitalized platform development	549,557	499,611	858,752	869,663
Total stock-based compensation	8,665,939	4,283,066	14,074,146	8,213,238
Stock Based Compensation [Member] | Publisher Partner Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost of revenue		27,623		35,662
Selling and marketing
General and administrative
Total costs charged to operations		27,623		35,662
Capitalized platform development
Total stock-based compensation		27,623		35,662
Stock Based Compensation [Member] | ABG Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost of revenue
Selling and marketing
General and administrative	396,251	360,289	752,581	720,578
Total costs charged to operations	396,251	360,289	752,581	720,578
Capitalized platform development
Total stock-based compensation	396,251	360,289	752,581	720,578
Restricted Stock [Member] | Stock Based Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost of revenue	24,570	35,750	49,030	73,326
Selling and marketing		298,187		597,402
General and administrative	141,897	135,332	145,342	158,252
Total costs charged to operations	166,467	469,269	194,372	828,980
Capitalized platform development	4,125	75,709	8,948	145,992
Total stock-based compensation	170,592	544,978	203,320	974,972
Common Stock Awards [Member] | Stock Based Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost of revenue	19,202	27,970	146,265	97,766
Selling and marketing	4,891	23,783	9,929	59,511
General and administrative	101,939	138,156	219,266	309,828
Total costs charged to operations	126,032	189,909	375,460	467,105
Capitalized platform development	2,351	80,608	5,071	121,765
Total stock-based compensation	128,383	270,517	380,531	588,870
Common Equity Awards [Member] | Stock Based Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost of revenue	1,708,404	1,073,674	2,998,778	2,083,266
Selling and marketing	1,507,535	701,925	2,479,048	1,380,204
General and administrative	4,135,866	819,916	6,262,481	1,575,163
Total costs charged to operations	7,351,805	2,595,515	11,740,307	5,038,633
Capitalized platform development	540,917	341,642	840,951	597,643
Total stock-based compensation	7,892,722	2,937,157	12,581,258	5,636,276
Outside Options [Member] | Stock Based Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost of revenue	1,455	1,967	3,496	3,173
Selling and marketing	74,372	43,489	149,178	98,867
General and administrative		95,394		150,577
Total costs charged to operations	75,827	140,850	152,674	252,617
Capitalized platform development	2,164	1,652	3,782	4,263
Total stock-based compensation	$ 77,991	$ 142,502	$ 156,456	$ 256,880

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