Note 10 - Stock Options, Incentive Plans, Stock Awards, and Employee Benefit Plan - Schedule of Share-based Compensation Activity (Details) - Restricted Stock [Member]	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
Outstanding, beginning balance (in shares) | shares	5,241,902
Outstanding, weighted average exercise price, beginning balance (in dollars per share) | $ / shares	$ 2.25
Granted (in shares) | shares	103,000
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 1.61
Vested (in shares) | shares	230,002
Vested, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Forfeited (in shares) | shares	132,000
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Outstanding, ending balance (in shares) | shares	4,982,900
Outstanding, weighted average exercise price, ending balance (in dollars per share) | $ / shares	$ 2.27
Weighted average contractual remaining life, outstanding (Year)	5 years 21 days
Aggregate intrinsic value, outstanding | $	$ (0.62)
Expected to Vest after year end (in shares) | shares	4,982,900
Expected to Vest, weighted average exercise price (in dollars per share) | $ / shares	$ 2.27
Weighted average contractual remaining life, expected to vest after year end (Year)	5 years 21 days
Aggregate intrinsic value, expected to vest after year end | $	$ (0.62)