Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.13)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_PropertyPlantAndEquipmentGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Note 4 - Vessels, Net and Advances for Vessels Under Construction (Details Textual)			6 Months Ended
	Apr. 26, 2017 USD ($) T	Feb. 28, 2017 USD ($) T	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Payments to Acquire Productive Assets				$ 48,753,000
M/T Stenaweco Elegance [Member]
Property, Plant and Equipment, Gross		$ 34,508,000
Shipyard Installments, Gross		33,935,000
Capitalized Expenses, Gross		$ 573,000
Size of Vessel \| T		50,118
Hull 2648 [Member]
Size of Vessel \| T	50,000
Payments to Acquire Productive Assets	$ 119