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Note 1 - Accounting Policies (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Note 1 - Accounting Policies (Details) [Line Items] |  |  |
Bank Overdrafts | $ 0 us-gaap_BankOverdrafts | $ 3,179,000 us-gaap_BankOverdrafts |
Due from Employees, Current | 486,000 us-gaap_DueFromEmployeesCurrent | 707,000 us-gaap_DueFromEmployeesCurrent |
Decrease in Depreciation Expense as Result of Adjustments to Estimated Lives and Salvage Values |  | 550,000 ptsi_DecreaseInDepreciationExpenseAsResultOfAdjustmentsToEstimatedLivesAndSalvageValues | 450,000 ptsi_DecreaseInDepreciationExpenseAsResultOfAdjustmentsToEstimatedLivesAndSalvageValues
Increase Decrease in Net Income Loss as Result of Adjustments to Estimated Lives and Salvage Values |  | 340,000 ptsi_IncreaseDecreaseInNetIncomeLossAsResultOfAdjustmentsToEstimatedLivesAndSalvageValues | 300,000 ptsi_IncreaseDecreaseInNetIncomeLossAsResultOfAdjustmentsToEstimatedLivesAndSalvageValues
Increase Decrease in Net Income Loss Per Share as Result of Adjustments to Estimated Lives and Salvage Values |  | 0.04 ptsi_IncreaseDecreaseInNetIncomeLossPerShareAsResultOfAdjustmentsToEstimatedLivesAndSalvageValues | 0.03 ptsi_IncreaseDecreaseInNetIncomeLossPerShareAsResultOfAdjustmentsToEstimatedLivesAndSalvageValues
Period for Amortizing Prepaid Tires |  |  | 24 months
Advertising Expense | $ 683,000 us-gaap_AdvertisingExpense | $ 662,000 us-gaap_AdvertisingExpense | $ 685,000 us-gaap_AdvertisingExpense
Truckload Services [Member] | Sales Revenue, Services, Net [Member] | Product Concentration Risk [Member] |  |  |
Note 1 - Accounting Policies (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 92.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_ProductConcentrationRiskMember / us-gaap_MajorCustomersAxis = ptsi_TruckloadServicesMember | 92.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_ProductConcentrationRiskMember / us-gaap_MajorCustomersAxis = ptsi_TruckloadServicesMember | 91.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueServicesNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_ProductConcentrationRiskMember / us-gaap_MajorCustomersAxis = ptsi_TruckloadServicesMember

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- Definition Decrease in depreciation expense as a result of adjustments to estimated lives and salvage values. + References No definition available. + Details
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- Definition Increase Decrease In Net Income Loss As Result Of Adjustments To Estimated Lives And Salvage Values. + References No definition available. + Details
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- Definition Increase (decrease) in net income (loss) per common share as a result of adjustments to estimated lives and salvage values. + References No definition available. + Details
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- Definition The number of months that prepaid tires are amortized over. + References No definition available. + Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=28361426&loc=d3e1243-112600 + Details
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- Definition Amounts due from an Entity employee, not to include stockholders or officers, which are usually due within 1 year (or 1 business cycle). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864 + Details
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