Summary of Significant Accounting Policies - Right of Use Assets and Liabilities (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Lease, Cost	$ 400,000	$ 500,000
Accounts receivable, net of allowances of $126,463 and $162,112, respectively	3,328,528			$ 3,605,411
Operating Lease, Right-of-Use Asset	2,493,530		$ 2,900,000	0
Operating Lease, Liability, Current	1,608,394			0
Operating Lease, Liability, Noncurrent	$ 1,531,183			$ 0
Operating Lease, Weighted Average Remaining Lease Term	2 years 26 days
Operating Lease, Weighted Average Discount Rate, Percent	6.20%
Operating Lease, Payments	$ 500,000	500,000
Sublease Income	200,000	$ 0
Remainder of 2019	1,265,236
Lessee, Operating Lease, Liability, Payments, Due Year Two	1,567,637
Lessee, Operating Lease, Liability, Payments, Due Year Three	596,475
Thereafter	0
Total minimum lease payments	3,429,348
Less interest	(289,771)
Present value of lease liabilities	$ 3,139,577		$ 3,600,000