Note 4 - Earnings (Loss) Per Share (Details Textual) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	105,548,111		165,834,223	286,281,585
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)	0	0	57,500	0
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)	0	0	553,822	549,687
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)		0		384,378
The 2029 Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	105,541,737