Summary of Significant Accounting Policies - Right of Use Assets and Liabilities (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Lease, Cost	$ 300,000	$ 600,000	$ 1,200,000	$ 2,100,000
Accounts receivable, net of allowances of $33,483 and $162,112, respectively	1,959,885		1,959,885			$ 3,605,411
Operating lease right-of-use assets	2,107,529		2,107,529		$ 2,900,000	0
Operating lease liabilities, net	1,704,858		1,704,858			0
Operating lease liabilities, net of current portion	$ 917,563		$ 917,563			$ 0
Weighted-average remaining lease term	19 months 10 days		19 months 10 days
Weighted-average discount rate	6.07%		6.07%
Operating Lease, Payments	$ 500,000	500,000	$ 1,500,000	1,600,000
Sublease Income	200,000	$ 107,048	500,000	$ 142,731
Remainder of 2019	438,074		438,074
Lessee, Operating Lease, Liability, Payments, Due Year Two	1,714,436		1,714,436
Lessee, Operating Lease, Liability, Payments, Due Year Three	639,526		639,526
Thereafter	0		0
Total minimum lease payments	2,792,036		2,792,036
Less interest	(169,615)		(169,615)
Present value of lease liabilities	$ 2,622,421		$ 2,622,421		$ 3,600,000