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Note 2 - Summary of Significant Accounting Policies - Estimated Useful Lives of Long-lived Assets (Details) | 9 Months Ended
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Mar. 31, 2018
Building [Member] | Minimum [Member] |
Property, plant, and equipment (Year) | 28 years
Building [Member] | Maximum [Member] |
Property, plant, and equipment (Year) | 40 years
Machinery and Equipment [Member] | Minimum [Member] |
Property, plant, and equipment (Year) | 3 years
Machinery and Equipment [Member] | Maximum [Member] |
Property, plant, and equipment (Year) | 10 years
Software and Software Development Costs [Member] | Minimum [Member] |
Property, plant, and equipment (Year) | 3 years
Software and Software Development Costs [Member] | Maximum [Member] |
Property, plant, and equipment (Year) | 8 years

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_SoftwareAndSoftwareDevelopmentCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |