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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Vessels and Depreciation (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($)
Property, Plant and Equipment [Line Items] |
Vessels Salvage Value Per Lightweight Ton | $ 300
Vessels | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 25 years
Vessels | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 30 years
Current Fleet [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 2 years
Current Fleet [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 23 years

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- Definition Vessels Salvage Value Per Lightweight Ton + References No definition available. + Details
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Namespace Prefix: | panl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=panl_VesselsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=panl_CurrentFleetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |