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Note 9 - Supplier Concentration	9 Months Ended
	Mar. 31, 2020
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	9.      SUPPLIER CONCENTRATION The Company uses contract manufacturing facilities in the People’s Republic of China. The majority of the contract manufacturing is done by four vendors with one vendor representing approximately 75% of the manufacturing costs. The Company has a long-term relationship with this vendor. However, increased costs from the vendor or an interruption of supply from this vendor could have a material adverse effect on the Company's profit margins and profitability.

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- Definition

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

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- References

No definition available.

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