Note 7 - Equity - Summary of Restricted Awards Activity (Details) - Restricted Stock	9 Months Ended
	Sep. 30, 2021 $ / shares shares
Outstanding, shares (in shares) | shares	2,845,525
Outstanding, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 4.28
Granted, shares (in shares) | shares	1,592,659
Granted, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 4.37
Vested, shares (in shares) | shares	(321,075)
Vested, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 8.03
Forfeited, shares (in shares) | shares	(129,279)
Forfeited, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 4.11
Outstanding, shares (in shares) | shares	3,987,830
Outstanding, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 4.02