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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Millions
3 Months Ended
Feb. 28, 2019
Jun. 30, 2019
Jun. 30, 2020
Dec. 31, 2019
Long-term Purchase Commitment [Line Items]        
Increase in royalties payable   $ 0.1    
Warranty reserve     $ 0.5 $ 0.3
Litigation settlement, amount $ 6.8      
Unconditional annual minimum inventory purchases     $ 25.5