Note 3 - Related Party Transactions - Expiration Dates of Contingent Future Liability (Details) - Investment Management Agreement [Member] $ in Thousands	Dec. 31, 2025 USD ($)
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	$ 28,015
December 31, 2025 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	219
March 31, 2026 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	3,120
June 30, 2026 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	3,471
September 30, 2026 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	3,002
December 31, 2026 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	2,285
March 31, 2027 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	2,582
June 30, 2027 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	2,368
September 30, 2027 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	2,085
December 31, 2027 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	2,144
March 31, 2028 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	2,290
June 30, 2028 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	2,799
September 30, 2028 Expiration [Member]
Incentive Fee Cap and Deferral Mechanism, Contingent Future Liability	$ 1,650