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Note 13 - Reserves (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 acre | Dec. 31, 2014 | Jun. 30, 2013 acre
Agriculture [Member] | Reserve for Environmental Costs [Member] | Central Maui [Member] |  |  |
Note 13 - Reserves (Details) [Line Items] |  |  |
Valuation Allowances and Reserves, Deductions | $ 551,000 us-gaap_ValuationAllowancesAndReservesDeductions / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = mlp_AgricultureMember / us-gaap_StatementGeographicalAxis = mlp_CentralMauiMember / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_ReserveForEnvironmentalCostsMember |  |
Area of Real Estate Property | 7 us-gaap_AreaOfRealEstateProperty / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = mlp_AgricultureMember / us-gaap_StatementGeographicalAxis = mlp_CentralMauiMember / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_ReserveForEnvironmentalCostsMember |  |
Agriculture [Member] | Central Maui [Member] |  |  |
Note 13 - Reserves (Details) [Line Items] |  |  |
Area of Real Estate Property |  |  | 7 us-gaap_AreaOfRealEstateProperty / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = mlp_AgricultureMember / us-gaap_StatementGeographicalAxis = mlp_CentralMauiMember
Reserve for Environmental Costs [Member] |  |  |
Note 13 - Reserves (Details) [Line Items] |  |  |
Valuation Allowances and Reserves, Deductions | $ 551,000 us-gaap_ValuationAllowancesAndReservesDeductions / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_ReserveForEnvironmentalCostsMember | $ 23,000 us-gaap_ValuationAllowancesAndReservesDeductions / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_ReserveForEnvironmentalCostsMember |

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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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