Note 9 - Borrowings - Leverage Ratio (Details)	9 Months Ended
	Sep. 30, 2023
Maximum [Member]
Leverage ratio	0.5
Leverage Ratio1 [Member]
Spread on variable rate	0.15%
Leverage Ratio1 [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Leverage ratio	1
Leverage Ratio1 [Member] | Base Rate [Member]
Leverage ratio	0
Leverage Ratio 2 [Member]
Spread on variable rate	15.00%
Leverage Ratio 2 [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Leverage ratio	1.25
Leverage Ratio 2 [Member] | Base Rate [Member]
Leverage ratio	0.25
Leverage Ratio 3 [Member]
Spread on variable rate	20.00%
Leverage Ratio 3 [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Leverage ratio	1.5
Leverage Ratio 4 [Member]
Spread on variable rate	20.00%
Leverage Ratio 4 [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Leverage ratio	1.75
Leverage Ratio 4 [Member] | Base Rate [Member]
Leverage ratio	0.75
Leverage Ratio 5 [Member]
Spread on variable rate	0.25%
Leverage Ratio 5 [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Leverage ratio	2
Leverage Ratio 5 [Member] | Base Rate [Member]
Leverage ratio	1