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Investment in Sales-Type Leases, Net (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Investment in Sales-Type Leases, Net [Abstract]    
Total future minimum lease payments receivable $ 96,886,262 $ 387,612,418
Less: executory cost (6,215,345) (93,054,738)
Less: unearned interest income (33,407,391) (154,799,027)
Investment in sales-type leases, net 57,263,526 139,758,653
Current portion 8,101,583 6,679,019
Noncurrent portion $ 49,161,943 $ 133,079,634