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Note 10 - Income Taxes (Details Textual) - USD ($) | 12 Months Ended |
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2017
Deferred Tax Assets, Valuation Allowance | $ 8,107,000 | $ 9,927,000
Deferred Tax Assets, Operating Loss Carryforwards, Domestic |  | 20,242,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local |  | 20,200,000
Deferred Tax Operating Loss Carry Forwards Expiration Year | 2030 |
Unrecognized Tax Benefits | $ 0 | $ 0

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96869850&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 + Details
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