Summary of Significant Accounting Policies - Cash and Restricted Cash (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and restricted cash, end of period	$ 3,778,066	$ 2,293,196	$ 1,141,869
Cash and Cash Equivalents, at Carrying Value	1,261,818	787,554
Restricted cash	2,516,248	1,505,642
Total cash and restricted cash, shown in statements of cash flows	$ 3,778,066	2,293,196	$ 1,141,869
ASU 2016 - 18 Impact
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and restricted cash, end of period		1,505,642
Total cash and restricted cash, shown in statements of cash flows		1,505,642
"Reported (Post-Adoption)"
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and restricted cash, end of period		787,554
Total cash and restricted cash, shown in statements of cash flows		$ 787,554