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v3.20.2

SUBSEQUENT EVENT (Details) - Subsequent Event [Member] - Purchase of Real Estate Agreement [Member] | Sep. 03, 2020 USD ($) | Sep. 02, 2020 USD ($) ft²
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Subsequent Event [Line Items] |  |
Area of building | ft² |  | 25,230
Aggregate purchase price of building |  | $ 6,509,340
Initial deposit | $ 75,000 |
Period to obtain maximum financing | 30 days |
Due diligence time period that deposit is refundable | 30 days |

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- Definition Due diligence time period that deposit is refundable. + References No definition available. + Details
Name: | pdex_DueDiligenceTimePeriod
Namespace Prefix: | pdex_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Aggregate purchase price of building. + References No definition available. + Details
Name: | pdex_PaymentForBuildingPurchase
Namespace Prefix: | pdex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Period to obtain maximum financing. + References No definition available. + Details
Name: | pdex_PeriodToObtainMaximumFinancing
Namespace Prefix: | pdex_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

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- Definition The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8,17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DepositAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementClassOfStockAxis=pdex_PurchaseOfRealEstateAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |