Note 11 - ERP Platform (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Capitalized Computer Software, Net, Ending Balance		$ 22,000
Capitalized Computer Software, Amortization		11,100	$ 900	$ 900
Components of ERP Platform Rquired Replacement [Member]
Capitalized Computer Software, Amortization		10,200
Components of ERP Platform Rquired Replacement [Member] | Scenario, Forecast [Member]
Capitalized Computer Software, Amortization	$ 9,300
Components of ERP Platform Rquired Replacement [Member] | Other Assets [Member]
Capitalized Computer Software, Net, Ending Balance		$ 19,900