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Note 13 - Stock-based Compensation - Share based Compensation (Details) - Restricted Stock [Member] | Dec. 31, 2021 USD ($)
--- | ---
2021 | $ 408,000
2022 | 343,000
2023 | 334,000
2024 | 363,000
2025 | 288,000
2026 | $ 111,000

X
- Definition Amount of cost to be recognized for nonvested award in year five under share-based payment arrangement. + References No definition available. + Details
Name: | ptsi_SharebasedPaymentArrangementNonvestedAwardCostToBeRecognizedYearFive
Namespace Prefix: | ptsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cost to be recognized for nonvested award in year four under share-based payment arrangement. + References No definition available. + Details
Name: | ptsi_SharebasedPaymentArrangementNonvestedAwardCostToBeRecognizedYearFour
Namespace Prefix: | ptsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cost to be recognized for nonvested award in year one under share-based payment arrangement. + References No definition available. + Details
Name: | ptsi_SharebasedPaymentArrangementNonvestedAwardCostToBeRecognizedYearOne
Namespace Prefix: | ptsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cost to be recognized for nonvested award in year six under share-based payment arrangement. + References No definition available. + Details
Name: | ptsi_SharebasedPaymentArrangementNonvestedAwardCostToBeRecognizedYearSix
Namespace Prefix: | ptsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cost to be recognized for nonvested award in year three under share-based payment arrangement. + References No definition available. + Details
Name: | ptsi_SharebasedPaymentArrangementNonvestedAwardCostToBeRecognizedYearThree
Namespace Prefix: | ptsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cost to be yet recognized for nonvested award in year two under share-based payment arrangement. + References No definition available. + Details
Name: | ptsi_SharebasedPaymentArrangementNonvestedAwardCostToBeRecognizedYearTwo
Namespace Prefix: | ptsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |