Annual report pursuant to Section 13 and 15(d)

NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Costs, Foreign Currency Translation, and Revenue) (Details)

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NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Costs, Foreign Currency Translation, and Revenue) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Incentive Trip Accrual    
Convention and meeting costs $ 6,375 $ 5,501
Advertising Costs    
Advertising costs 1,800 1,800
Research and Development    
Research and development expenses $ 1,500 $ 2,100