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Note 2 - Summary of Significant Accounting Policies - Useful Lives of Property, Plant & Equipment (Details)	Mar. 31, 2023
Buildings and Building Improvements [Member] \| Minimum [Member]
Estimated useful life (Year)	3 years
Buildings and Building Improvements [Member] \| Maximum [Member]
Estimated useful life (Year)	20 years
Telephone and Computer Equipment [Member] \| Minimum [Member]
Estimated useful life (Year)	3 years
Telephone and Computer Equipment [Member] \| Maximum [Member]
Estimated useful life (Year)	10 years
Furniture, Fixtures, and Miscellaneous Equipment [Member] \| Minimum [Member]
Estimated useful life (Year)	3 years
Furniture, Fixtures, and Miscellaneous Equipment [Member] \| Maximum [Member]
Estimated useful life (Year)	15 years
Computer Software [Member] \| Minimum [Member]
Estimated useful life (Year)	1 year
Computer Software [Member] \| Maximum [Member]
Estimated useful life (Year)	7 years