Quarterly Financial Data (unaudited) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 4,013,537	$ 2,828,704	$ 3,390,009	$ 1,768,485	$ 2,845,123	$ 2,743,056	$ 2,196,110	$ 1,720,754	$ 12,000,735	$ 9,505,043
Total cost of revenue	2,988,115	3,068,332	1,813,430	841,449	1,496,172	1,690,223	1,638,853	1,205,264	8,711,326	6,030,512
Operating Expenses	7,123,985	5,729,212	5,588,800	5,262,497	6,588,304	6,083,995	7,317,565	6,703,475	23,704,494	26,693,339
Net loss	$ 6,411,457	$ 4,926,097	$ 3,311,476	$ 3,847,362	$ 5,919,924	$ 5,085,452	$ 6,674,458	$ 5,685,530	$ (18,496,392)	$ (23,365,364)