Note 13 - Severance Costs - Accrued Severance Liability Activity (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Balance at	$ 235	$ 39	$ 39
Accrual of expense	83	173	523
Payments	(218)	(205)	(313)
Adjustments	(14)		(14)
Balance at	$ 86	$ 7	$ 235

Liability for amount due employees, in addition to wages and any other money that employers owe employees, when their employment ends through a layoff or other termination. For example, a company may provide involuntarily terminated employees with a lump sum payment equal to one week's salary for every year of employment.

No definition available.

Name:	us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant