Note 12 - Severance Costs - Accrued Severance Liability Activity (Details) - USD ($)	6 Months Ended	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Balance	$ 1,772,000	$ 235,000	$ 235,000
Accrual of expense	492,000	83,000	1,900,000
Payments	(549,000)	(218,000)	(363,000)
Adjustments		(14,000)
Balance	$ 1,715,000	$ 86,000	$ 1,772,000

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