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Summary of Significant Accounting Policies (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Interest Rate Swap [Member]
Liabilities:
Liabilities fair value nonrecurring basis	$ 34,855	$ 37,346
Cash and money market accounts [Member]
Assets:
Assets fair value nonrecurring basis	3,847,632	5,150,344
Bank certificates of deposit [Member]
Assets:
Assets fair value nonrecurring basis	489,582	5,474,013
Level 1 [Member] | Interest Rate Swap [Member]
Liabilities:
Liabilities fair value nonrecurring basis
Level 1 [Member] | Cash and money market accounts [Member]
Assets:
Assets fair value nonrecurring basis	3,847,632	5,150,344
Level 1 [Member] | Bank certificates of deposit [Member]
Assets:
Assets fair value nonrecurring basis
Level 2 [Member] | Interest Rate Swap [Member]
Liabilities:
Liabilities fair value nonrecurring basis	34,855	37,346
Level 2 [Member] | Cash and money market accounts [Member]
Assets:
Assets fair value nonrecurring basis
Level 2 [Member] | Bank certificates of deposit [Member]
Assets:
Assets fair value nonrecurring basis	489,582	5,474,013
Level 3 [Member] | Interest Rate Swap [Member]
Liabilities:
Liabilities fair value nonrecurring basis
Level 3 [Member] | Cash and money market accounts [Member]
Assets:
Assets fair value nonrecurring basis
Level 3 [Member] | Bank certificates of deposit [Member]
Assets:
Assets fair value nonrecurring basis

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