Summary of Significant Accounting Policies - Right of Use Assets and Liabilities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Lease, Cost	$ 400,000	$ 1,000,000	$ 800,000	$ 1,500,000
Accounts receivable, net of allowances of $191,458 and $162,112, respectively	1,706,141		1,706,141			$ 3,605,411
Operating lease right-of-use assets	2,454,349		2,454,349		$ 2,900,000	0
Operating lease liabilities, net	1,753,015		1,753,015			0
Operating lease liabilities, net of current portion	$ 1,281,804		$ 1,281,804			$ 0
Weighted-average remaining lease term	1 year 9 months 28 days		1 year 9 months 28 days
Weighted-average discount rate	6.04%		6.04%
Operating Lease, Payments	$ 500,000	500,000	$ 1,000,000	1,100,000
Sublease Income	200,000	$ 35,683	300,000	$ 35,683
Remainder of 2019	947,848		947,848
Lessee, Operating Lease, Liability, Payments, Due Year Two	1,788,450		1,788,450
Lessee, Operating Lease, Liability, Payments, Due Year Three	639,526		639,526
Thereafter	0		0
Total minimum lease payments	3,375,824		3,375,824
Less interest	(341,005)		(341,005)
Present value of lease liabilities	$ 3,034,819		$ 3,034,819		$ 3,600,000