Note 14 - Stockholders' Equity - Option Activity (Details)	9 Months Ended
	Sep. 30, 2021 $ / shares shares
Outstanding (in shares) | shares	76,064
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 27.35
Forfeited, canceled (in shares) | shares	(30,596)
Forfeited, canceled, weighted average exercise price (in dollars per share) | $ / shares	$ 46.77
Outstanding (in shares) | shares	45,468
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 14.28