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Share-based Compensation (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Sharebased Compensation        
Restricted stock compensation expense $ 214,852 $ 182,928 $ 371,959 $ 437,427
Non-qualified option stock compensation expense 28,969 26,499 54,704 53,441
Share-based compensation expense $ 243,821 $ 209,427 $ 426,663 $ 490,868