CHINA JOINT VENTURE - Rollforward of Joint Venture (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning interest in China JV			$ 138
Contributions	$ 195		195
Net loss attributable to Apyx	(5)	$ 0	(9)	$ 0
Ending interest in China JV	324		324		$ 138
Corporate Joint Venture
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning interest in China JV	140		144
Contributions	203		203		154
Net loss attributable to Apyx	(5)		(9)
Ending interest in China JV	$ 338		$ 338		$ 144