Note 13 - Severance Costs - Accrued Severance Liability Activity (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2019
Balance	$ 1,134	$ 1,772	$ 1,772
Accrual of expense	46	492	560
Payments	(319)	(549)	(1,198)
Balance	$ 861	$ 1,715	$ 1,134

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