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Compensation Plans - Summary of Stock-based Compensation (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cost of revenue	$ 28,208,372	$ 26,738,833
Selling and marketing	17,528,709	9,359,938
General and administrative	5,638,830	10,410,205
Total stock-based compensation	5,099,012	3,560,120
Stock-based Compensation [Member]
Cost of revenue	1,443,938	1,126,209
Selling and marketing	1,051,357	1,068,600
General and administrative	2,603,717	1,365,311
Total costs charged to operations	5,099,012	3,560,120
Capitalized platform development	309,195	370,052
Total stock-based compensation	5,408,207	3,930,172
Stock-based Compensation [Member] | Publisher Partner Warrant [Member]
Cost of revenue		8,039
Selling and marketing
General and administrative
Total costs charged to operations		8,039
Capitalized platform development
Total stock-based compensation		8,039
Stock-based Compensation [Member] | ABG Warrants [Member]
Cost of revenue
Selling and marketing
General and administrative	356,330	360,289
Total costs charged to operations	356,330	360,289
Capitalized platform development
Total stock-based compensation	356,330	360,289
Restricted Stock Awards [Member] | Stock-based Compensation [Member]
Cost of revenue	24,460	37,576
Selling and marketing		299,215
General and administrative	3,445	22,920
Total costs charged to operations	27,905	359,711
Capitalized platform development	4,823	70,283
Total stock-based compensation	32,728	429,994
Common Stock Awards [Member] | Stock-based Compensation [Member]
Cost of revenue	127,063	69,796
Selling and marketing	5,038	35,728
General and administrative	117,327	171,672
Total costs charged to operations	249,428	277,196
Capitalized platform development	2,720	41,157
Total stock-based compensation	252,148	318,353
Common Equity Awards [Member] | Stock-based Compensation [Member]
Cost of revenue	1,290,374	1,009,592
Selling and marketing	971,513	678,279
General and administrative	2,126,615	755,247
Total costs charged to operations	4,388,502	2,443,118
Capitalized platform development	300,034	256,001
Total stock-based compensation	4,688,536	2,699,119
Outside Options [Member] | Stock-based Compensation [Member]
Cost of revenue	2,041	1,206
Selling and marketing	74,806	55,378
General and administrative		55,183
Total costs charged to operations	76,847	111,767
Capitalized platform development	1,618	2,611
Total stock-based compensation	$ 78,465	$ 114,378

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