Note 1 - Organization and Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Securities (Details) - shares	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Potentially dilutive securities excluded from calculation (in shares)	16,091,419	14,926,416
Unvested Restricted Stock [Member]
Potentially dilutive securities excluded from calculation (in shares)	11,439,016	9,898,448
Share-Based Payment Arrangement, Option [Member]
Potentially dilutive securities excluded from calculation (in shares)	4,465,216	4,694,529
Warrant [Member]
Potentially dilutive securities excluded from calculation (in shares)	165,214	312,272
Convertible Debt Securities [Member]
Potentially dilutive securities excluded from calculation (in shares)	21,973	21,167