Note 12 - 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, 2020 USD ($) $ / shares shares
Outstanding, beginning balance (in shares) | shares	4,023,780
Outstanding, weighted average exercise price, beginning balance (in dollars per share) | $ / shares	$ 2.25
Granted (in shares) | shares	1,634,000
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 1.20
Vested (in shares) | shares	(106,667)
Vested, weighted average exercise price (in dollars per share) | $ / shares
Forfeited (in shares) | shares	(450,000)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares
Outstanding, ending balance (in shares) | shares	5,101,113
Outstanding, weighted average exercise price, ending balance (in dollars per share) | $ / shares	$ 1.96
Weighted average contractual remaining life, outstanding (Year)	6 years 343 days
Aggregate intrinsic value, outstanding | $	$ 0.71
Expected to Vest after year end (in shares) | shares	5,101,113
Expected to Vest, weighted average exercise price (in dollars per share) | $ / shares	$ 1.96
Weighted average contractual remaining life, expected to vest after year end (Year)	6 years 343 days
Aggregate intrinsic value, expected to vest after year end | $	$ 0.71