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Note 6 - China Joint Venture - Rollforward of Joint Venture (Details) - Corporate Joint Venture [Member] - USD ($)
3 Months Ended 9 Months Ended 28 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Beginning interest in China JV $ 210,000 $ 184,000 $ 130,000 $ 229,000  
Contributions 0 0 61,000 0 $ 214,000
Net income (loss) attributable to Apyx 31,000 (22,000) 50,000 (67,000)  
Ending interest in China JV $ 241,000 $ 162,000 $ 241,000 $ 162,000 $ 241,000