Quarterly report pursuant to Section 13 or 15(d)

Note 16 - Subsequent Event (Details Textual)

v3.10.0.1
Note 16 - Subsequent Event (Details Textual) - Marshall Islands Limited Liability Companies [Member] - Subsequent Event [Member]
$ in Millions
Jul. 05, 2018
USD ($)
Business Acquisition, Percentage of Voting Interests Acquired 100.00%
Number of Businesses Acquired 2
Business Combination, Consideration Transferred, Liabilities Incurred $ 11