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Investment in Sales-Type Leases, Net (Details) - USD ($)
Sep. 30, 2016
Dec. 31, 2015
Investment in Sales-Type Leases, Net [Abstract]    
Total future minimum lease payments receivable $ 248,196,665 $ 387,612,418
Less: executory cost (70,089,703) (93,054,738)
Less: unearned interest income (61,430,134) (154,799,027)
Investment in sales-type leases, net 116,676,828 139,758,653
Current portion 6,948,365 6,679,019
Noncurrent portion $ 109,728,463 $ 133,079,634