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Note 19 - Loss on Sale of Vessels (Details Textual) $ in Thousands			12 Months Ended
	Dec. 10, 2020 USD ($)	Dec. 01, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Proceeds From Sale of Vessels			$ 310,016	$ 0	$ 0
Number of Non-scrubber Fitted Vessels			1
Vessels [Member]
Proceeds From Sale of Vessels			$ 310,016
Sale of Vessel Expense			10,852
Deposit Assets, Total			2,000
Gain (Loss) on Disposition of Property Plant Equipment, Total			12,355
M/T Eco Bel Air [Member]
Deposit Assets, Total			1,000
Gain (Loss) on Disposition of Property Plant Equipment, Total	$ (767)
M/T Eco Beverly Hills [Member]
Deposit Assets, Total			$ 1,000
Gain (Loss) on Disposition of Property Plant Equipment, Total		$ (806)

X

- Definition

The number of non-scrubber fitted vessels.

+ References

No definition available.

+ Details

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Namespace Prefix:	tops_
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X

- Definition

The amount of proceeds from sale of vessels.

+ References

No definition available.

+ Details

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X

- Definition

The expense from sale of vessel.

+ References

No definition available.

+ Details

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X

- Definition

The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an 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 210.5-02.8,17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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X

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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