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STOCK BASED COMPENSATION - Common Stock to Consultants (Details) - Consultant
9 Months Ended
Sep. 30, 2021
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rate 0.80%
Expected volatility 54.30%
Expected life (in years) 10 years
Fair value of Common Stock $ 3.34