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RETIREMENT PLAN - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Retirement Benefits [Abstract] |  |
Defined contribution plan, vesting period | 3 years |
Defined contribution plan, vesting percentage after 3 years | 100.00% |
Defined contribution plan, employer matching contribution | 50.00% |
Defined contribution plan, percent of employees' gross pay | 3.00% |
Company matching contributions | $ 0.3 | $ 0.3

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- Definition Defined Contribution Plan, Employers Matching Contribution, Vesting Percentage After Three Years + References No definition available. + Details
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- Definition Defined Contribution Plan, Employers Matching Contribution, Vesting Period + References No definition available. + Details
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Namespace Prefix: | apyx_
Data Type: | xbrli:durationItemType
Balance Type: | na
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration