Stock-Based Compensation - Stock-based Compensation Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Stock-based compensation expense	$ 16,523,506	$ 5,478,625
Cost of Revenues [Member]
Stock-based compensation expense	1,479,448	244,239
General and administrative expense
Stock-based compensation expense	9,430,279	3,756,820
Selling and Marketing Expense [Member]
Stock-based compensation expense	4,515,654	1,178,115
Engineering And Development [Member]
Stock-based compensation expense	$ 1,098,125	$ 299,451