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FINANCIAL STATEMENT PRESENTATION (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Basis of Presentation and Principles of Consolidation
Number of operating segments | segment			1
Allowance for doubtful accounts			$ 100		$ 200
Restructuring
Restructuring	$ 2,162			$ 2,580
Reduction of discretionary cash incentives		$ 1,600

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Amount of allowance for credit loss on accounts receivable.

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