NON-CONTROLLING INTEREST - Rollforward of Joint Venture (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning interest in China JV			$ 0
Contributions	$ 148		148
Net loss attributable to Apyx	(6)	$ 0	(6)	$ 0
Ending interest in China JV	$ 142		$ 142
Chinese Supplier
Noncontrolling Interest [Line Items]
Ownership interest	51.00%		51.00%
Corporate Joint Venture
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning interest in China JV	$ 0		$ 0
Contributions	154		154
Net loss attributable to Apyx	(6)		(6)
Ending interest in China JV	$ 148		$ 148

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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