Note 2 - Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Anti-dilutive securities excluded from computation of earnings per share (in shares)	3,930,000	74,000
Preferred Stock [Member]
Anti-dilutive securities excluded from computation of earnings per share (in shares)	0	21,000
Options, Warrants, Restricted Stock Units [Member]
Anti-dilutive securities excluded from computation of earnings per share (in shares)	522,000	12,000
Pipe October 2025 Warrants [Member]
Anti-dilutive securities excluded from computation of earnings per share (in shares)	1,667,000	0
Misfits Warrant [Member]
Anti-dilutive securities excluded from computation of earnings per share (in shares)	536,000	0
Other Warrants [Member]
Anti-dilutive securities excluded from computation of earnings per share (in shares)	1,205,000	0
Additional Investment Rights (AIRs) [Member]
Anti-dilutive securities excluded from computation of earnings per share (in shares)	0	41,000