The minimum requirement of market adjusted total assets of the Company minus total liabilities.

No definition available.

Name:	tops_DebtInstrumentCovenantMarketAdjustedTotalAssetsMinusTotalLiabilitiesMinimum
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

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Namespace Prefix:	tops_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The ratio of cover for net assets in the third year of a credit facility covenant.

+ References

No definition available.

+ Details

Name:	tops_DebtInstrumentNetAssetCoverRatioYearThree
Namespace Prefix:	tops_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum amount of free liquidity per bareboated chartered-in vessel required from a credit facility's covenants.

+ References

No definition available.

+ Details

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

- 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

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:	dtr-types: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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
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

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
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

+ Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=tops_AbnBankFacilityMember
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_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
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Note 7 - Debt (Details Textual) - USD ($) $ in Thousands			6 Months Ended	12 Months Ended
Note 7 - Debt (Details Textual) - USD ($) $ in Thousands	May 06, 2021	Mar. 18, 2021	Jun. 30, 2021	Aug. 06, 2023	Aug. 06, 2022
ABN Bank [Member] \| Eco West Coast [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 36,800
Debt Instrument, Periodic Payment, Total		615
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 21,500	$ 22,040
Debt Instrument, Net Asset Cover Ratio		125.00%
Total Debt To Market Adjusted Total Assets Ratio Percentage	75.00%	75.00%
Minimum Free Liquidity, Per Collaterlized Vessel		$ 500
Debt Instrument, Covenant, Market Adjusted Total Assets Minus Total Liabilities, Minimum		$ 60,000
Debt Instrument, Net Asset Cover Ratio, Year Three	125.00%
Minimum Free Liquidity, Per Bareboated Charter-in Vessel	$ 500
ABN Bank [Member] \| Eco West Coast [Member] \| Forecast [Member]
Debt Instrument, Periodic Payment, Total				$ 625	$ 750
Nord/ LB Bank [Member]
Long-term Line of Credit, Total			$ 173,617
ABN Bank Facility [Member] \| Eco Malibu [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 38,000
London Interbank Offered Rate (LIBOR) [Member] \| ABN Bank [Member]
Debt Instrument, Basis Spread on Variable Rate			0.096%
London Interbank Offered Rate (LIBOR) [Member] \| ABN Bank [Member] \| Eco West Coast [Member]
Debt Instrument, Basis Spread on Variable Rate		2.50%	3.00%