Summary of Significant Accounting Policies (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Assets:
Cash and money market accounts	$ 6,202,663	$ 6,293,293
Bank certificates of deposit	1,992,098	2,480,753	$ 8,675,329
Liabilities:
Interest rate swaps		(58,526)
Total, net	8,194,761	8,715,520
Fair Value, Inputs, Level 1 [Member]
Assets:
Cash and money market accounts	6,202,663	6,293,293
Bank certificates of deposit
Liabilities:
Interest rate swaps
Total, net	6,202,663	6,293,293
Fair Value, Inputs, Level 2 [Member]
Assets:
Cash and money market accounts
Bank certificates of deposit	1,992,098	2,480,753
Liabilities:
Interest rate swaps		(58,526)
Total, net	1,992,098	2,422,227
Fair Value, Inputs, Level 3 [Member]
Assets:
Cash and money market accounts
Bank certificates of deposit
Liabilities:
Interest rate swaps
Total, net