Note 13 - Goodwill and Goodwill Impairment (Details Textual)	6 Months Ended
Jun. 30, 2017
Number of Reporting Units	2

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

No definition available.

Name:	us-gaap_NumberOfReportingUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration