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Note 14 - Commitments and Contingencies (Details) (USD $) | Dec. 31, 2014
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Settlement Agreement [Member] |
Note 14 - Commitments and Contingencies (Details) [Line Items] |
Percentage of Capital Costs Agreed to be Paid to Install Filtration Systems in Water Well if Presence of Nematocide Exceeds Specified Levels and for Maintenance and Operating Costs | 90.00%mlp_PercentageOfCapitalCostsAgreedToBePaidToInstallFiltrationSystemsInWaterWellIfPresenceOfNematocideExceedsSpecifiedLevelsAndForMaintenanceAndOperatingCosts / us-gaap_LossContingenciesByNatureOfContingencyAxis = mlp_SettlementAgreementMember
Reserve for Environmental Costs [Member] |
Note 14 - Commitments and Contingencies (Details) [Line Items] |
Loss Contingency Accrual | 59,000 us-gaap_LossContingencyAccrualAtCarryingValue / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_ReserveForEnvironmentalCostsMember

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- Definition Represents the percentage of capital costs to install filtration systems in water wells if the presence of a nematocide, commonly known as DBCP, exceeds specified levels, and for the ongoing maintenance and operating cost. + References No definition available. + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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