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6. CASH AND CASH EQUIVALENTS (Details Narrative)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash and cash equivalents1 [line items]      
Percentage of fixed interest rate 4.39% 6.39% 6.89%
Top of Range [Member]      
Cash and cash equivalents1 [line items]      
Percentage of accrued interest on certificate of deposits 106.00% 106.00% 106.00%
Bottom Of Range [Member]      
Cash and cash equivalents1 [line items]      
Percentage of accrued interest on certificate of deposits 80.00% 40.00% 50.00%