Note 1 - Significant Accounting Policies and Recent Accounting Pronouncements - Useful Life of Property, Plant, and Equipment (Details)	12 Months Ended
Dec. 31, 2019
Furniture and Equipment [Member] \| Minimum [Member]
Useful life (Year)	5 years
Furniture and Equipment [Member] \| Maximum [Member]
Useful life (Year)	7 years
Land and Land Improvements [Member]
Useful life (Year)	15 years

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.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration