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Note 1 - Summary of Significant Accounting Policies - Property, Plant and Equipment Useful Lives (Details)	12 Months Ended
	Dec. 31, 2020
Building [Member] | Minimum [Member]
Property, plant and equipment lives (Year)	20 years
Building [Member] | Maximum [Member]
Property, plant and equipment lives (Year)	50 years
Machinery and Equipment [Member] | Minimum [Member]
Property, plant and equipment lives (Year)	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property, plant and equipment lives (Year)	15 years
Software Development [Member] | Minimum [Member]
Property, plant and equipment lives (Year)	3 years
Software Development [Member] | Maximum [Member]
Property, plant and equipment lives (Year)	5 years

X

- 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

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
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X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_SoftwareDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: