Summary of Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Cash and cash equivalents	$ 2,385,653	$ 3,990,160
Restricted cash	302,072	263,405
Total cash, cash equivalents, and restricted cash as shown in our unaudited consolidated statements of cash flows	$ 2,687,725	$ 4,253,565	$ 1,316,376	$ 1,712,266