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v3.19.2

Note 2 - Significant Accounting Policies (Details Textual) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Prepaid Bareboat Charter Hire |  |  | $ 5,277,000
Voyage Contract, Standard Payment Term Percentage | 95.00% |  |
Demurrage Revenue | $ 667,000 | $ 0 |
Despatch Expense | 0 | $ 0 |
M/T Stenaweco Energy [Member] |  |  |
Charter Rate Per Day | 8,586 |  |
Vessel Acquisition Purchase Price | 21,200,000 |  |
M/T Stenaweco Evolution [Member] |  |  |
Charter Rate Per Day | 8,625 |  |
Vessel Acquisition Purchase Price | $ 21,200,000 |  |

X
- Definition Represents charter rate per day. + References No definition available. + Details
Name: | tops_CharterRatePerDay
Namespace Prefix: | tops_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of demurrage revenue recognized. + References No definition available. + Details
Name: | tops_DemurrageRevenue
Namespace Prefix: | tops_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of expense for despatch during the period. + References No definition available. + Details
Name: | tops_DespatchExpense
Namespace Prefix: | tops_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of bareboat charter hire paid in advance. + References No definition available. + Details
Name: | tops_PrepaidBareboatCharterHire
Namespace Prefix: | tops_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents vessel acquisition purchase price. + References No definition available. + Details
Name: | tops_VesselAcquisitionPurchasePrice
Namespace Prefix: | tops_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of standard payment terms for voyage contract. + References No definition available. + Details
Name: | tops_VoyageContractStandardPaymentTermPercentage
Namespace Prefix: | tops_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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