Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Accounts receivable, net of allowances	$ 3,328,528	$ 3,605,411
Contract assets	1,200,000	1,200,000
Write-offs in accounts receivable	0
Write-offs in contract assets account	0
Deferred revenue	$ 9,288,092	$ 9,366,490
Revenue expected to be recognized during next 12 months	66.00%