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INTEREST IN JOINT VENTURE INVESTMENT - Changes in Ownership Interest (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Stockholders' Equity Attributable to Noncontrolling Interest [Abstract]    
Beginning interest in China JV $ 0  
Contributions 148  
Net loss attributable to Apyx (10) $ 0
Ending interest in China JV 138 0
China joint venture    
Stockholders' Equity Attributable to Noncontrolling Interest [Abstract]    
Beginning interest in China JV 0  
Contributions 154  
Net loss attributable to Apyx (10)  
Ending interest in China JV $ 144 $ 0
Chinese Supplier    
Noncontrolling Interest [Line Items]    
Ownership interest 51.00%