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Note 1 - Organization and Summary of Significant Accounting Policies - Property and Equipment Useful Lives (Details)	9 Months Ended
	Sep. 30, 2021
Building and Building Improvements [Member] \| Minimum [Member]
Property and equipment useful life (Year)	10 years
Building and Building Improvements [Member] \| Maximum [Member]
Property and equipment useful life (Year)	40 years
Furniture and Equipment [Member] \| Minimum [Member]
Property and equipment useful life (Year)	5 years
Furniture and Equipment [Member] \| Maximum [Member]
Property and equipment useful life (Year)	12 years