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Note 10 - Stock Options, Incentive Plans, Stock Awards, and Employee Benefit Plan - Schedule of Share-based Compensation Activity (Details) - Restricted Stock [Member] - USD ($)
 12 Months Ended
Feb. 08, 2023
Dec. 31, 2023
Outstanding, beginning balance (in shares)   4,982,900
Outstanding, weighted average exercise price, beginning balance (in dollars per share)   $ 2.27
Granted (in shares) 1,403,000 1,520,000
Granted, weighted average exercise price (in dollars per share)   $ 1.74
Vested (in shares)   3,000
Vested, weighted average exercise price (in dollars per share)   $ 0
Forfeited (in shares)   115,000
Forfeited, weighted average exercise price (in dollars per share)   $ 0
Outstanding, ending balance (in shares)   6,384,900
Outstanding, weighted average exercise price, ending balance (in dollars per share)   $ 2.17
Weighted average contractual remaining life, outstanding (Year)   5 years 1 month 17 days
Aggregate intrinsic value, outstanding   $ (0.45)
Expected to Vest after year end (in shares)   6,384,900
Expected to Vest, weighted average exercise price (in dollars per share)   $ 2.17
Weighted average contractual remaining life, expected to vest after year end (Year)   5 years 1 month 17 days
Aggregate intrinsic value, expected to vest after year end   $ (0.45)