Annual report pursuant to Section 13 and 15(d)

Note 1 - Nature of Operations and Accounting Policies - Property and Equipment Useful Life (Details)

v3.19.1
Note 1 - Nature of Operations and Accounting Policies - Property and Equipment Useful Life (Details)
12 Months Ended
Dec. 31, 2018
Crew Transfer Vessels [Member]  
Estimated useful life (Year) 10 years
All Other Offshore Support Vessels [Member]  
Estimated useful life (Year) 20 years