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12. STOCK-BASED COMPENSATION (Details 1) - $ / shares
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]    
Outstanding 121,600 121,600
Range of exercise prices, lower limit $ 3.57  
Range of exercise prices, upper limit $ 7.27  
Weighted average remaining contractual life (years) 4 months 28 days