Note 17 - Warrant Liabilities - Warrant Activity (Details) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Balance (in shares)	774,000
Weighted average remaining contractual life (Year)	47 days	229 days
Weighted average exercise price (in dollars per share)	$ 1.4927
Exercisable (in shares)	774,000
Exercisable, weighted average remaining contractual life (Year)	47 days	229 days
Exercisable, weighted average exercise price (in dollars per share)	$ 1.4927
Granted/Vested (in shares)
Expired (in shares)	(645,000)
Exercised (in shares)
Balance (in shares)	129,000	774,000
Weighted average exercise price (in dollars per share)	$ 1.4927	$ 1.4927
Exercisable (in shares)	129,000	774,000
Exercisable, weighted average exercise price (in dollars per share)	$ 1.4927	$ 1.4927