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Note 3 - Summary of Significant Accounting Policies (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Inventory Adjustments | $ 56,000 | $ 30,000
Deferred Revenue | $ 0 | 0
Product Warranty, Term | 5 years |
Standard and Extended Product Warranty Accrual | $ 85,000 | 120,000
Impairment of Long-Lived Assets Held-for-use | 0 | 0
Unrecognized Tax Benefits | $ 0 | $ 0
Weighted Average Number of Shares Outstanding, Basic and Diluted | 24,544,605 | 14,927,390
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 12,607,853 | 5,795,292
Cash | $ 121,000 |
Cash Equivalents, at Carrying Value | 0 | $ 0
Allowance for Doubtful Accounts Receivable | $ 0 | $ 0
Minimum [Member] |  |
Property, Plant and Equipment, Useful Life | 3 years |
Maximum [Member] |  |
Property, Plant and Equipment, Useful Life | 10 years |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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