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Note 14 - Income Taxes (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2010
Note 14 - Income Taxes (Details) [Line Items]        
Deferred Income Tax Expense (Benefit) $ 4,666,000us-gaap_DeferredIncomeTaxExpenseBenefit $ (19,834,000)us-gaap_DeferredIncomeTaxExpenseBenefit $ 2,721,000us-gaap_DeferredIncomeTaxExpenseBenefit  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   (22,400,000)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount    
Proceeds and Excess Tax Benefit from Share-based Compensation 0us-gaap_ProceedsAndExcessTaxBenefitFromSharebasedCompensation 0us-gaap_ProceedsAndExcessTaxBenefitFromSharebasedCompensation 0us-gaap_ProceedsAndExcessTaxBenefitFromSharebasedCompensation  
Operating Loss Carryforwards to be Expired in Year One 200,000plmt_OperatingLossCarryforwardsToBeExpiredInYearOne      
Operating Loss Carryforwards to be Expired in Year Two 8,900,000plmt_OperatingLossCarryforwardsToBeExpiredInYearTwo      
Operating Loss Carryforwards to be Expired in Year Three 279,000plmt_OperatingLossCarryforwardsToBeExpiredInYearThree      
Net Operating Loss Carryforwards Utilized During Period 9,200,000plmt_NetOperatingLossCarryforwardsUtilizedDuringPeriod      
Deferred Tax Assets, Net of Valuation Allowance 21,051,000us-gaap_DeferredTaxAssetsNet 26,299,000us-gaap_DeferredTaxAssetsNet    
Estimated Future Utilization of Built in Losses 53,000,000plmt_EstimatedFutureUtilizationOfBuiltInLosses      
Estimated Future Utilization of Built in Losses Per Year 1,100,000plmt_EstimatedFutureUtilizationOfBuiltInLossesPerYear      
Private Placement [Member]        
Note 14 - Income Taxes (Details) [Line Items]        
Stock Issued During Period, Shares, New Issues (in Shares)       9,993,995us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
Share Price (in Dollars per share)       $ 10.40us-gaap_SharePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
Domestic Tax Authority [Member]        
Note 14 - Income Taxes (Details) [Line Items]        
Operating Loss Carryforwards 9,400,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		      
Deferred Tax Assets, Net of Valuation Allowance 17,100,000us-gaap_DeferredTaxAssetsNet
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		      
Allowance for Loan and Lease Losses [Member]        
Note 14 - Income Taxes (Details) [Line Items]        
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount (1,200,000)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= us-gaap_AllowanceForLoanAndLeaseLossesMember		      
Operating Loss Carryforward [Member]        
Note 14 - Income Taxes (Details) [Line Items]        
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount (2,800,000)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= plmt_OperatingLossCarryforwardMember		      
Operating Loss Carryforward Expiring 2031 [Member]        
Note 14 - Income Taxes (Details) [Line Items]        
Net Operating Loss Carryforwards Utilized During Period 7,300,000plmt_NetOperatingLossCarryforwardsUtilizedDuringPeriod
/ us-gaap_TaxCreditCarryforwardAxis
= plmt_OperatingLossCarryforwardExpiring2031Member		      
Operating Loss Carryforward Expiring 2032 [Member]        
Note 14 - Income Taxes (Details) [Line Items]        
Net Operating Loss Carryforwards Utilized During Period $ 1,900,000plmt_NetOperatingLossCarryforwardsUtilizedDuringPeriod
/ us-gaap_TaxCreditCarryforwardAxis
= plmt_OperatingLossCarryforwardExpiring2032Member