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Investment in Sales-Type Leases, Net (Details) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Investment in Sales-Type Leases, Net [Abstract]    
Total future minimum lease payments receivable $ 251,758,685 $ 387,612,418
Less: executory cost (71,723,294) (93,054,738)
Less: unearned interest income (62,545,595) (154,799,027)
Investment in sales-type leases, net 117,489,796 139,758,653
Current portion 5,629,204 6,679,019
Noncurrent portion $ 111,860,592 $ 133,079,634