Note 7 - Other Current Liabilities (Details Textual) - USD ($)	Jul. 01, 2024	Jan. 19, 2024	Jan. 18, 2024	Mar. 31, 2024	Jan. 17, 2024	Dec. 31, 2023
License Agreement with Philip Morris USA for Aerosolization Technology [Member]
License Agreement, Fee			$ 100,000
License Agreement, Maximum Milestone Payments					$ 1,400,000
Licensing Agreement Accrued Payments				$ 700,000		$ 900,000
License Agreement with Philip Morris USA for Aerosolization Technology [Member] | Forecast [Member]
License Agreement, Fee	$ 400,000
License Agreement with Philip Morris Products for Aerosolization Technology [Member]
License Agreement, Fee		$ 75,000
License Agreement, Maximum Milestone Payments					$ 1,400,000
License Agreement with Philip Morris Products for Aerosolization Technology [Member] | Forecast [Member]
License Agreement, Fee	$ 325,000