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STOCK BASED COMPENSATION, 2020 Stock plan (Details) - shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
STOCK BASED COMPENSATION      
Number of common stock reserved for issuance   4,759,109 1,000,000
Number of additional shares authorized   3,759,109  
Options to purchase shares granted 10,000 60,232  
Common Stock remain available for issuance   556,695  
Restricted stock purchase agreements      
STOCK BASED COMPENSATION      
Shares issued pursuant to restricted stock purchase agreements   25,375 41,000
Employees      
STOCK BASED COMPENSATION      
Options to purchase shares granted 204,625 136,000 380,500
Employees | Stock options      
STOCK BASED COMPENSATION      
Options to purchase shares granted   516,500 721,125
Third-party consultant | Stock options      
STOCK BASED COMPENSATION      
Options to purchase shares granted   60,232 70,232
Third-party consultant | Restricted Stock Units      
STOCK BASED COMPENSATION      
Shares issued pursuant to restricted stock purchase agreements 0 3,411,057 3,411,057