Note 5 - Concentration of Risk - Risk Exposure (Details)	3 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Portion of Accounts Receivable	$ 11,826,000		$ 4,300,000	$ 1,148,000
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Significant Customers	3	3
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Three Customers [Member]
% Total Revenue from Operations	81.30%	65.70%
Portion of Accounts Receivable	$ 11,700	$ 11,600