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v3.19.1

Note 1 - Accounting Policies - Useful Lives of Property and Equipment (Details) | 12 Months Ended
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Dec. 31, 2018
Vehicles [Member] | Minimum [Member] |
Property and equipment (Year) | 3 years
Vehicles [Member] | Maximum [Member] |
Property and equipment (Year) | 5 years
Furniture and Fixtures [Member] | Minimum [Member] |
Property and equipment (Year) | 3 years
Furniture and Fixtures [Member] | Maximum [Member] |
Property and equipment (Year) | 7 years
Machinery and Equipment [Member] | Minimum [Member] |
Property and equipment (Year) | 3 years
Machinery and Equipment [Member] | Maximum [Member] |
Property and equipment (Year) | 8 years
Building and Building Improvements [Member] | Minimum [Member] |
Property and equipment (Year) | 5 years
Building and Building Improvements [Member] | Maximum [Member] |
Property and equipment (Year) | 40 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
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_VehiclesMember
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_FurnitureAndFixturesMember
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_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |