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Lease (Details) - Schedule of net investment in sales-type leases - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Schedule of net investment in sales-type leases [Abstract]    
Total future minimum lease payments receivable $ 2,976,071 $ 1,210,305
Less: unearned income, representing interest (271,838) (124,653)
Present value of minimum lease payments receivables 2,704,233 1,085,652
Less: Current portion (836,714) (235,245)
Non-current portion $ 1,867,519 $ 850,407