Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details) - Deferred Lease Revenue [Member]
Dec. 31, 2017
USD ($)
Other Commitments [Line Items]  
2018 $ 686,182
2019 274,365
2020 147,853
Total $ 1,108,400