Note 9 - Investments in Marketable Securities - Available for Sale Marketable Equity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
NHI Common Stock, Shares (in shares)	1,630,642	1,630,642
NHI Common Stock, Cost	$ 24,734	$ 24,734
NHI Common Stock, fair value	140,064	111,117
NHI Common Stock [Member]
NHI Common Stock, fair value	$ 113,003	$ 91,071