Quarterly report pursuant to Section 13 or 15(d)

Note 1 - Basis of Presentation and Accounting Policies - Property and Equipment Useful Life (Details)

v3.10.0.1
Note 1 - Basis of Presentation and Accounting Policies - Property and Equipment Useful Life (Details)
9 Months Ended
Sep. 30, 2018
Wind Farm Utility Vessel [Member]  
Estimated useful life (Year) 10 years
Offshore Support Vessels [Member]  
Estimated useful life (Year) 20 years