Note 1 - Organization and Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Securities (Details) - shares	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Potentially dilutive securities excluded from calculation (in shares)	14,873,637	13,456,358
Unvested Restricted Stock [Member]
Potentially dilutive securities excluded from calculation (in shares)	9,872,652	8,324,240
Share-Based Payment Arrangement, Option [Member]
Potentially dilutive securities excluded from calculation (in shares)	4,667,279	4,799,523
Warrant [Member]
Potentially dilutive securities excluded from calculation (in shares)	312,272	312,272
Convertible Debt Securities [Member]
Potentially dilutive securities excluded from calculation (in shares)	21,434	20,323