Note 10 - Employee Benefit Plans - Amount Recognized in Balance Sheet (Details) - Norwegian Pension Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
	$ 111	$ 284
Deferred Costs and Other Assets [Member]
Deferred costs and other assets	429
Deferred Costs and Other Assets [Member] | Predecessor [Member]
Deferred costs and other assets		474
Other Liabilities [Member]
Other liabilities	$ (318)	$ (190)