Note 6 - Variable Interest Entities (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	$ 0	$ 0
Argo Holdings [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	43.40%	43.40%
Net Lease [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage		71.00%
Variable Interest Entity, Primary Beneficiary [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	$ 0	$ 0