Business Combinations - Summary of Pro Forma Financial Information (Details) - TriSource, APS, Ventanex, and cPayPlus - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Revenue	$ 37,712,710	$ 36,744,774	$ 116,540,354	$ 107,403,501
Net loss	(14,874,500)	(57,562,188)	(37,361,006)	(71,546,277)
Net loss attributable to non-controlling interests	(3,855,178)	(23,450,835)	(13,377,656)	(29,147,953)
Net loss attributable to the Company	$ (11,019,322)	$ (34,111,353)	$ (23,983,350)	$ (42,398,324)
Loss per Class A share - basic and diluted	$ (0.19)	$ (0.59)	$ (0.70)	$ (1.24)