Note 14 - Warrants - Summary of Warrant Activity (Details) - $ / shares	12 Months Ended		36 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Balance (in shares)	79,100	3,959,005	3,959,005
Balance (in dollars per share)	$ 4.75	$ 4.33	$ 4.33
Exercised, number of shares (in shares)	(79,100)	(3,871,405)	(3,879,905)
Exercised, weighted average exercise price (in dollars per share)	$ 4.75		$ 4.33
Balance (in shares)	0	79,100
Balance (in dollars per share)	$ 0	$ 4.75