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ACCRUED LIABILITIES (Tables)
 12 Months Ended
Dec. 31, 2020
Accrued Liabilities, Current [Abstract]  
Summary of accrued liabilities
Accrued liabilities consist of the following at December 31:
 20202019
Accrued wages, bonuses and commissions$63,814 $49,126 
Other accrued liabilities19,270 26,108 
 $83,084 $75,234