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13. STOCK-BASED COMPENSATION (Details 1) - $ / shares
9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]    
Outstanding 127,600 135,100
Range of exercise prices, lower limit $ 3.57  
Range of exercise prices, upper limit $ 7.27  
Weighted average remaining contractual life (years) 10 months 13 days