Note 8 - Commitments and Contingent Liabilities (Details Textual) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2017	Jun. 30, 2016
Leasehold Improvements, Gross	$ 0.3	$ 0.3
Operating Leases, Rent Expense	0.3	$ 0.2
Lease at 2500 Northwinds Parkway, Alpharetta, Georgia [Member]
Leasehold Improvements, Gross	$ 0.1

Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 4
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6812-107765

Name:	us-gaap_LeaseholdImprovementsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant