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Investment in Sales-Type Leases, Net (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Investments [Abstract]    
Total future minimum lease payments receivable $ 56,477,739 $ 88,661,266
Less: executory cost (3,623,100) (5,687,704)
Less: unearned interest (14,905,393) (19,398,707)
Less: realized interest income but not yet received (5,245,244) (9,336,141)
Less: allowance for net investment receivable (24,416,442) (29,276,658)
Investment in sales-type leases, net 8,287,560 24,962,056
Current portion
Noncurrent portion $ 8,287,560 $ 24,962,056