Note 13 - Severance Costs - Accrued Severance Liability Activity (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018
Balance	$ 1,772	$ 235	$ 235
Accrual of expense			1,900
Payments	(197)	(159)	(363)
Adjustments
Balance	$ 1,575	$ 76	$ 1,772

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