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10. INCOME TAXES (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Current tax expense:    
Federal $ 719,341 $ 130,248
State 367,819 63,496
Total current tax expense 1,087,160 193,744
Deferred tax expense (benefit):    
Federal 227,248 591,493
State 65,247 166,886
Total deferred tax expense 292,495 758,379
Total $ 1,379,654 $ 952,123