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Note 4(b) - Vessels, Net (Details Textual) - USD ($) $ in Thousands					12 Months Ended
	Nov. 03, 2020	Oct. 29, 2020	Nov. 20, 2019	Nov. 18, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Payments to Acquire Property, Plant, and Equipment, Total					$ (0)	$ 48,140	$ (0)
M/T Stenaweco Energy [Member]
Payment to Purchase of Vessel				$ 23,953
Payments to Acquire Property, Plant, and Equipment, Total		$ 19,808		$ 2,477
M/T Stenaweco Evolution [Member]
Payment to Purchase of Vessel			$ 24,187
Payments to Acquire Property, Plant, and Equipment, Total	$ 22,570		$ 1,323

X

- Definition

Represents the cash outflow to purchase a vessel.

+ References

No definition available.

+ Details

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Namespace Prefix:	tops_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

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Balance Type:	credit
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X

- Details

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Namespace Prefix:
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X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=tops_MTStenawecoEvolutionMember
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