Note 16 - The Financing and Warrant Liabilities - Warrant Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance (in shares)	2,159,865	774,000
Balance, weighted average remaining contractual life (Year)	2 years 4 months 9 days	2 years 9 months 10 days	7 months 17 days
Weighted average exercise price (in dollars per share)	$ 2.00	$ 1.4927
Exercisable (in shares)	129,000	774,000
Balance, January 1, 2020 (Year)	2 years 4 months 9 days	18 days	7 months 17 days
Exercisable, weighted average exercise price (in dollars per share)	$ 1.4927	$ 1.4927
Issued/Vested (in shares)	2,970,840	2,030,865
Issued/Vested, weighted average remaining contractual life (Year)	2 years 7 months 17 days	3 years
Issued/Vested, weighted average exercise price (in dollars per share)	$ 3.70	$ 2.03
Expired (in shares)		(645,000)
Expired, weighted average exercise price (in dollars per share)		$ 1.4927
Expired, exercisable (in shares)	(129,000)	(645,000)
Issued/Vested, exercisable (in shares)	5,001,705
Issued/Vested, exercisable, weighted average remaining contractual life (Year)	2 years 4 months 9 days
Issued/Vested, exercisable, weighted average exercise price (in dollars per share)	$ 3.02
Exercised, weighted average exercise price (in dollars per share)	$ 1.4927
Balance (in shares)	5,001,705	2,159,865	774,000
Weighted average exercise price (in dollars per share)	$ 3.02	$ 2.00	$ 1.4927
Exercisable (in shares)	5,001,705	129,000	774,000
Exercisable, weighted average exercise price (in dollars per share)	$ 3.02	$ 1.4927	$ 1.4927