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Summary of Significant Accounting Policies (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Assets:
Cash and money market accounts	$ 2,354,561	$ 2,521,050
Bank certificates of deposit	7,199,947
Interest rate swaps		40,209
Liabilities:
Interest rate swaps	86,973
Fair Value, Inputs, Level 1 [Member]
Assets:
Cash and money market accounts	2,354,561	2,521,050
Bank certificates of deposit
Interest rate swaps
Liabilities:
Interest rate swaps
Fair Value, Inputs, Level 2 [Member]
Assets:
Cash and money market accounts
Bank certificates of deposit	7,199,947
Interest rate swaps		40,209
Liabilities:
Interest rate swaps	86,973
Fair Value, Inputs, Level 3 [Member]
Assets:
Cash and money market accounts
Bank certificates of deposit
Interest rate swaps
Liabilities:
Interest rate swaps

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