Note 4 - Income (Loss) Per Share (Details Textual) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	82,843,173	55,580,089	62,204,391
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)	18,750	211,187	445,437
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)	549,680	1,599,212
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)	405,721	1,316,570
Options Exercised and Restricted Stock Units Settled, Shares (in shares)	549,680	1,810,399
Stock Issued During Period, Shares, Options Exercised and Restricted Stock Units Settled (in shares)	162,709	493,829
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)	886,007		0