Unaudited Interim Condensed Consolidated Statements of Comprehensive Loss (Parentheticals) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Interest and finance costs, related party	$ 948	$ 361

Interest and debt related expenses associated with nonoperating financing activities of the entity with related party.

No definition available.

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