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Lease (Details 1) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease expenses $ 337,282 $ 301,437
Cash paid for amounts included in the measurement of operating lease liabilities $ 337,282 $ 301,437
Weighted average remaining lease term 3 years 29 days 3 years 29 days
Weighted average discount rate 0.55% 0.55%