Represents the size of vessel.

No definition available.

Name:	tops_SizeOfVessel
Namespace Prefix:	tops_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	duration

- Definition

The first optional year delivery rate for a charterer's vessel.

+ References

No definition available.

+ Details

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

- Definition

The second optional year delivery rate for a charterer's vessel.

+ References

No definition available.

+ Details

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

- Definition

The rate of delivery per day for a vessel in the first three years.

+ References

No definition available.

+ Details

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

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=tops_Hull2648Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=tops_ECOSevenIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=tops_MalibuMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=tops_AstarteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tops_ECOSevenIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tops_CityOfAthensMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tops_EcoNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 1 - Basis of Presentation and General Information (Details Textual)	May 30, 2017 USD ($)	Apr. 26, 2017 USD ($) T	Mar. 30, 2017 USD ($)	Feb. 28, 2017 T	Feb. 20, 2017 USD ($)	Jun. 30, 2017
M/T Stenaweco Elegance [Member]
Size of Vessel \| T				50,118
Hull 2648 [Member]
Size of Vessel \| T		50,000
ECO Seven, Inc. [Member]
Vessel Delivery Rate, Charterer's First Optional Year					$ 17,500
Vessel Delivery Rate, Charterer's Second Optional Year					18,500
Vessel Delivery Rate Per Day in the First Three Years					$ 16,500
ECO Seven, Inc. [Member] \| M/T Stenaweco Elegance [Member]
Size of Vessel \| T				50,118
ECO Seven, Inc. [Member] \| Malibu [Member]
Business Acquisition, Percentage of Voting Interests Acquired	41.00%		9.00%		40.00%
Business Combination, Consideration Transferred	$ 6,500,000		$ 1,500,000		$ 6,500,000
Astarte [Member]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Business Combination, Consideration Transferred		$ 6,000,000
Astarte [Member] \| Hull 2648 [Member]
Size of Vessel \| T		50,000
ECO Seven, Inc. [Member]
Equity Method Investment, Ownership Percentage						90.00%
City of Athens [Member]
Equity Method Investment, Ownership Percentage						50.00%
Eco Nine [Member]
Equity Method Investment, Ownership Percentage						50.00%