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Stock-Based Compensation (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Stock-based compensation expenses | $ 507,051 | $ 519,891
Total remaining unamortized stock-based compensation cost not yet recognized | $ 935,882 |
Total compensation cost not yet recognized, Period for recognition | 2 years 7 months 10 days | 2 years 8 months 2 days
Cost of revenues |  |
Stock-based compensation expenses | $ 86,649 | $ 94,803
Research and development |  |
Stock-based compensation expenses | 137,537 | 151,121
Sales and marketing |  |
Stock-based compensation expenses | 121,802 | 121,633
General and administrative |  |
Stock-based compensation expenses | $ 161,063 | $ 152,334

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