Represents charter rate per day.

No definition available.

Name:	tops_CharterRatePerDay
Namespace Prefix:	tops_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the charter rate per day for the first optional additional year.

+ References

No definition available.

+ Details

Name:	tops_CharterRatePerDayOptionalYearOne
Namespace Prefix:	tops_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the charter rate per day for the second optional additional year.

+ References

No definition available.

+ Details

Name:	tops_CharterRatePerDayOptionalYearTwo
Namespace Prefix:	tops_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of market adjusted total assets minus total liabilities required under the covenant of the debt instrument.

+ References

No definition available.

+ Details

Name:	tops_DebtInstrumentCovenantMarketAdjustedTotalAssetsMinusTotalLiabilities
Namespace Prefix:	tops_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the ratio of cover for net assets in a credit facility covenant.

+ References

No definition available.

+ Details

Name:	tops_DebtInstrumentNetAssetCoverRatio
Namespace Prefix:	tops_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of shipbuilding costs for credit line option under the terms of the disposal group.

+ References

No definition available.

+ Details

Name:	tops_DisposalGroupCreditLineOptionPercentageOfShipbuildingCosts
Namespace Prefix:	tops_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of payables forgiven as consideration for disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	tops_DisposalGroupIncludingDiscontinuedOperationConsiderationPayablesForgiven
Namespace Prefix:	tops_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The minimum amount of free liquidity per collateralized vessel required from a credit facility's covenants.

+ References

No definition available.

+ Details

Name:	tops_MinimumFreeLiquidityPerCollaterlizedVessel
Namespace Prefix:	tops_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of consecutive quarterly installments.

+ References

No definition available.

+ Details

Name:	tops_NumberOfConsecutiveQuarterlyInstallments
Namespace Prefix:	tops_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The ownership percentage received during the period.

+ References

No definition available.

+ Details

Name:	tops_OwnershipPercentageReceived
Namespace Prefix:	tops_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the transaction term for related party transactions.

+ References

No definition available.

+ Details

Name:	tops_RelatedPartyTransactionTerm
Namespace Prefix:	tops_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The term of time charters.

+ References

No definition available.

+ Details

Name:	tops_TimeChartersTerm
Namespace Prefix:	tops_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The additional option term of time charters.

+ References

No definition available.

+ Details

Name:	tops_TimeChartersTermAdditionalOption
Namespace Prefix:	tops_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of total debt to market-adjusted total assets ratio required in a credit facility's covenants.

+ References

No definition available.

+ Details

Name:	tops_TotalDebtToMarketAdjustedTotalAssetsRatioPercentage
Namespace Prefix:	tops_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=tops_ABNBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=tops_EcoMalibuMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=tops_AlphaBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=tops_AlphaFacilityFirstConsecutiveQuarterlyInstallmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=tops_AlphaFacilitySecondConsecutiveQuarterlyInstallmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=tops_EcoWestCoastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=tops_ACompanyAffiliatedWithMrEvangelosJPistiolisMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=tops_ThreeShipowningCompaniesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=tops_AMajorOilCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=tops_AMajorOilCompany2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=tops_MarshallIslandsCompanyWithSuexmaxTankerContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=tops_MarshallIslandsCompanyWithVlccTankerContractForDeliveryJanuary2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=tops_MarshallIslandsCompanyWithVlccTankerContractForDeliveryFebruary2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 20 - Subsequent Events (Details Textual)	Mar. 18, 2021 USD ($)	Mar. 17, 2021 USD ($)	Jan. 06, 2021 USD ($)	Aug. 01, 2016 USD ($)
ABN Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 64,400,000
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid				$ 9,050,000
Subsequent Event [Member] \| Eco Malibu [Member] \| Alpha Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 38,000,000
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid		$ 21,500,000
Subsequent Event [Member] \| Eco Malibu [Member] \| Alpha Bank [Member] \| Alpha Facility, First Consecutive Quarterly Installments [Member]
Number of Consecutive Quarterly Installments		12
Debt Instrument, Periodic Payment, Principal		$ 750,000
Subsequent Event [Member] \| Eco Malibu [Member] \| Alpha Bank [Member] \| Alpha Facility, Second Consecutive Quarterly Installments [Member]
Number of Consecutive Quarterly Installments		12
Debt Instrument, Periodic Payment, Principal		$ 625,000
Subsequent Event [Member] \| Eco West Coast [Member] \| ABN Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 36,800,000
Number of Consecutive Quarterly Installments	24
Debt Instrument, Periodic Payment, Principal	$ 615,000
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 22,040,000
Debt Instrument, Net Asset Cover Ratio	125.00%
Total Debt To Market Adjusted Total Assets Ratio Percentage	75.00%
Minimum Free Liquidity, Per Collaterlized Vessel	$ 500
Debt Instrument, Covenant, Market Adjusted Total Assets Minus Total Liabilities	$ 60,000,000
Subsequent Event [Member] \| Eco West Coast [Member] \| ABN Bank [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	2.50%
Subsequent Event [Member] \| A Company Affiliated With Mr. Evangelos J. Pistiolis [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 23,815,000
Subsequent Event [Member] \| Three Shipowning Companies [Member]
Proceeds from Divestiture of Businesses			10,000,000
Disposal Group, Including Discontinued Operation, Consideration, Payables Forgiven			$ 1,150,000
Disposal Group, Credit Line Option, Percentage of Shipbuilding Costs			10.00%
Line of Credit Facility, Maximum Borrowing Capacity			$ 23,815,000
Subsequent Event [Member] \| Three Shipowning Companies [Member] \| A Major Oil Company [Member]
Charter Rate Per Day			$ 36,000
Time Charters, Term, Additional Option (Year)			2 years
Charter Rate Per Day, Optional Year One			$ 39,000
Charter Rate Per Day, Optional Year Two			$ 41,500
Time Charters, Term (Year)			3 years
Subsequent Event [Member] \| Three Shipowning Companies [Member] \| A Major Oil Company 2 [Member]
Charter Rate Per Day			$ 35,750
Time Charters, Term, Additional Option (Year)			2 years
Charter Rate Per Day, Optional Year One			$ 39,000
Charter Rate Per Day, Optional Year Two			$ 41,500
Time Charters, Term (Year)			3 years
Subsequent Event [Member] \| Three Shipowning Companies [Member] \| A Company Affiliated With Mr. Evangelos J. Pistiolis [Member]
Related Party Transaction Term (Year)			5 years
Charter Rate Per Day			$ 32,450
Time Charters, Term, Additional Option (Year)			2 years
Charter Rate Per Day, Optional Year One			$ 33,950
Charter Rate Per Day, Optional Year Two			$ 35,450
Subsequent Event [Member] \| Three Shipowning Companies [Member] \| Marshall Islands Company with Suexmax Tanker Contract [Member]
Ownership Percentage Received			100.00%
Subsequent Event [Member] \| Three Shipowning Companies [Member] \| Marshall Islands Company with VLCC Tanker Contract for Delivery January 2022 [Member]
Ownership Percentage Received			35.00%
Subsequent Event [Member] \| Three Shipowning Companies [Member] \| Marshall Islands Company with VLCC Tanker Contract for Delivery February 2022 [Member]
Ownership Percentage Received			35.00%