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Investment in Sales-Type Leases, Net (Details 1) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Investment in Sales-Type Leases, Net [Abstract]    
2019 $ 44,364,506  
2020 19,929,270  
2021 20,098,242  
2022 22,129,636  
2023 16,522,245  
Thereafter 80,225,240  
Total $ 203,269,139 $ 222,132,929