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Note 1 - Description of the Business and Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2019
Percentage Of Ownership In Subsidiaries	100.00%
Number of Wholly Owned Subsidiaries	2
Building and Building Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Building and Building Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	40 years
Furniture and Fixtures [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Furniture and Fixtures [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years