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Subsequent Events (Details) - Subsequent Event [Member] - USD ($) $ in Millions | Nov. 03, 2017 | Oct. 11, 2017
--- | --- | ---
m/v Bulk Pride [Member] |  |
Subsequent Event [Line Items] |  |
Vessel Purchase Price |  | $ 13.8
Venture Barge Corp. [Member] |  |
Subsequent Event [Line Items] |  |
Vessel Purchase Price | $ 2.4 |
Equity Method Investment, Ownership Percentage | 50.00% |

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- Definition Vessel Purchase Price + References No definition available. + Details
Name: | panl_VesselPurchasePrice
Namespace Prefix: | panl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=panl_VentureBargeCorp.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |