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Note 15 - Activity of Business Segments - Consolidated Net Property and Equipment, Goodwill and Intangible Assets (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Consolidated assets | $ 4,415,000 | $ 4,009,000
Operating Segments [Member] |  |
Consolidated assets | 3,238,000 | 2,954,000
Operating Segments [Member] | Building Supply [Member] |  |
Consolidated assets | 1,806,000 | 1,867,000
Operating Segments [Member] | Disposable Protective Apparel [Member] |  |
Consolidated assets | 1,432,000 | 1,087,000
Corporate, Non-Segment [Member] |  |
Consolidated assets | $ 1,177,000 | $ 1,055,000

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- Definition Total consolidated assets + References No definition available. + Details
Name: | apt_TotalConsolidatedAssets
Namespace Prefix: | apt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=apt_BuildingSupplyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=apt_DisposableProtectiveApparelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |