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Note 11 - Income Taxes (Details Textual) - USD ($) | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member] | State Tax Code Change [Member] |  |  |  |
Unrecognized Tax Benefits |  |  |  | $ 362,000
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member] |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local |  | $ 1,716,000 | $ 1,716,000 |
Deferred Tax Assets, Valuation Allowance |  | 1,716,000 | 1,716,000 |
Deferred State and Local Income Tax Expense (Benefit) |  | 0 | 6,000 | 489,000
State and Local Jurisdiction [Member] | Oregon State Tax [Member] | Scenario, Forecast [Member] |  |  |  |
Deferred Tax Assets, Research and Development Credit, Expired During Period | $ 25,000 |  |  |
State and Local Jurisdiction [Member] | Oregon State Tax [Member] |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local |  | 162,000 | 173,000 |
Deferred Tax Assets, Research and Development Credit, Expired During Period |  | 11,000 |  |
Domestic Tax Authority [Member] |  |  |  |
Deferred Tax Assets, Capital Loss Carryforwards |  | 456,000 | 506,000 |
Foreign Tax Authority [Member] | Canada Revenue Agency [Member] |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Foreign |  |  | 4,272,000 |
Deferred Tax Assets, Valuation Allowance |  | 6,150,000 | 6,161,000 |
Deferred Tax Assets, Capital Loss Carryforwards |  | 4,272,000 | 4,272,000 |
Unrecognized Tax Benefits |  | $ 421,000 | 447,000 |
Oregon Net Operating Loss, Term |  | 4 years |  |
Unrecognized Tax Benefits, Interest on Income Taxes Accrued |  | $ 244,000 | 292,000 |
Unrecognized Tax Benefits, Income Tax Penalties Accrued |  | 142,000 | 152,000 |
Reserve for Unrecognized Tax Benefits, Including Penalties and Interest |  | 807,000 | 891,000 |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate |  | 665,000 | 739,000 |
Unrecognized Tax Benefits, Period Increase (Decrease) |  | 26,000 | 40,000 | 147,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense |  | 48,000 | 41,000 | 62,000
Unrecognized Tax Benefits, Income Tax Penalties Expense |  | $ 10,000 | $ 17,000 | $ 50,000

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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