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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Accrued wages, commissions, bonuses and benefits $ 10,056 $ 10,510
Accrued products warranty 3,076 3,373
Accrued taxes 2,087 2,164
Other 9,647 8,726
Accrued liabilities $ 24,866 $ 24,773