v3.22.1
Lines of credit (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Lines Of Credit    
Balance at beginning $ 11,914,092 $ 19,310,707
Advances received on lines of credit 1,149,279 820,766
Repayment of principal borrowed on lines of credit   (1,038,967)
Interest incurred on lines of credit 1,402,187 1,464,077
Repayment of interest on lines of credit (456,725) (8,642,491)
Balance at ending $ 14,008,833 $ 11,914,092