Note 15 - Warrant Liabilities - Warrant Activity (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Balance (in shares)	5,001,705
Balance, weighted average remaining contractual life (Year)	1 year 10 months 9 days	2 years 4 months 9 days
Weighted average exercise price (in dollars per share)	$ 3.02
Exercisable (in shares)	5,001,705
Balance, January 1, 2022 (Year)	1 year 10 months 9 days	2 years 4 months 9 days
Exercisable, weighted average exercise price (in dollars per share)	$ 3.02
Granted/Vested (in shares)	0
Balance (in shares)	5,001,705	5,001,705
Weighted average exercise price (in dollars per share)	$ 3.02	$ 3.02
Exercisable (in shares)	5,001,705	5,001,705
Exercisable, weighted average exercise price (in dollars per share)	$ 3.02	$ 3.02