Note 3 - Net Income (Loss) Per Common Share - Basic and Diluted - Schedule of Common Stock Equivalents Outstanding (Details) - shares	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Stock options (in shares)	26,012,500	24,993,500	26,134,500
Common Stock, Other Shares, Outstanding	73,642,500		66,764,500
Series C Preferred Stock [Member]
Shares of Series C Preferred Stock (in shares)	40,630,000		40,630,000
Restricted Stock Units (RSUs) [Member]
Restricted Stock Units (in shares)	7,000,000		0