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Investment in Sales-Type Leases, Net (Details 1) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Investment in Sales-Type Leases, Net [Abstract]    
2018 $ 31,067,306  
2019 13,039,087  
2020 13,039,087  
2021 13,039,087  
2022 11,523,982  
Thereafter 17,446,665  
Total $ 99,155,214 $ 96,886,262