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TRADE ACCOUNTS PAYABLE AND OTHER CURRENT LIABILITIES
12 Months Ended
Dec. 31, 2020
Other Liabilities Disclosure [Abstract]  
TRADE ACCOUNTS PAYABLE AND OTHER CURRENT LIABILITIES

8. TRADE ACCOUNTS PAYABLE AND OTHER CURRENT LIABILITIES

Trade accounts payable and other current liabilities consisted of the following:

December 31,
      2020       2019
Trade accounts payable $      49,182 $      87,524
Payroll and related expenses 39,290 7,788
Patent monetization expenses 120,105 107,605
Current lease liabilities 44,630 47,364
Deferred revenue 34,178 -
Professional and other service fees 132,206 140,277
Total trade accounts payable and other current liabilities $ 419,591 $ 390,558