Note 9 - Investments in Marketable Securities - Available for Sale Marketable Equity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
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	166,754	140,064
NHI Common Stock [Member]
NHI Common Stock, fair value	$ 129,636	$ 113,003