Revenue from Contracts with Customers (Details 2) - USD ($)	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Revenues	$ 39,665,356	$ 21,916,902
North America
Revenues	38,542,381	20,780,311
Europe
Revenues	$ 1,122,978	$ 1,136,591

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details