Note 7 - Debt - Schedule of Debt (Details) (Parentheticals) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
	Oct. 07, 2024	Sep. 30, 2024	Dec. 31, 2023	Jan. 31, 2024	Oct. 28, 2022
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	Bank Credit Spreads [Member]	Secured Overnight Financing Rate (SOFR) [Member]	Secured Overnight Financing Rate (SOFR) [Member]
The 265 Million Note Due January 31, 2028 [Member]
Face amount		$ 265.0	$ 265.0
Interest rate, stated		3.18%	3.18%	2.76%	2.16%
Maturity date		Jan. 31, 2028	Jan. 31, 2028
The 265 Million Note Due January 31, 2028 [Member] | Minimum [Member]
Interest rate, variable		1.45%	1.45%
The 265 Million Note Due January 31, 2028 [Member] | Maximum [Member]
Interest rate, variable		2.10%	2.10%
The 80 Million Note Due June 1, 2027 [Member]
Face amount		$ 80.0	$ 80.0
Interest rate, stated		3.72%	3.72%
Maturity date		Jun. 01, 2027	Jun. 01, 2027
The 19 Million Note Due December 1, 2024 [Member]
Face amount		$ 19.0	$ 19.0
Interest rate, stated		4.15%	4.15%
Maturity date		Dec. 01, 2024	Dec. 01, 2024
The 14 Million Note Due September 11, 2024 [Member]
Face amount		$ 14.0	$ 14.0
Interest rate, stated		4.34%	4.34%
Maturity date		Sep. 11, 2024	Sep. 11, 2024
The 14.3 Million Note Due September 11, 2024 [Member]
Face amount		$ 14.3	$ 14.3
Interest rate, stated		4.34%	4.34%
Maturity date		Sep. 11, 2024	Sep. 11, 2024
The 15.1 Million Note Due January 6, 2024 [Member]
Face amount		$ 15.1	$ 15.1
Interest rate, stated		4.99%	4.99%
Maturity date		Jan. 06, 2024	Jan. 06, 2024
The 50.0 Million Series A Note Due March 22, 2029 [Member]
Face amount		$ 50.0	$ 50.0
Interest rate, stated		5.09%	5.09%
Maturity date		Mar. 22, 2029	Mar. 22, 2029
The 50.0 Million Series B Note Due March 22, 2029 [Member]
Face amount		$ 50.0	$ 50.0
Interest rate, stated		5.17%	5.17%
Maturity date		Mar. 22, 2029	Mar. 22, 2029
The 2.5 Million Note Due February 28, 2025 [Member]
Face amount		$ 2.5
Interest rate, stated		7.79%
Maturity date		Feb. 28, 2025
The $50 Million Note Due September 16, 2026 [Member]
Face amount		$ 50.0	$ 50.0
Interest rate, stated		3.71%	3.71%
Maturity date		Sep. 16, 2026	Sep. 16, 2026
The $50 Million Note Due September 16, 2026 [Member] | Minimum [Member]
Interest rate, variable		1.50%	1.50%
The $50 Million Note Due September 16, 2026 [Member] | Maximum [Member]
Interest rate, variable		2.10%	2.10%
The $56.3 Million Note Due July 31, 2031 [Member]
Face amount		$ 56.3
Interest rate, stated		6.23%
Maturity date		Jul. 31, 2031
The 2022 Facility [Member]
Interest rate, variable		1.50%	1.50%
Maturity date		Sep. 16, 2026	Sep. 16, 2026
Basis Point Credit Spread Adjustment		2.10%	2.10%