Note 6 - Equity - Summary of Restricted Awards Activity (Details) - Restricted Stock	3 Months Ended
	Mar. 31, 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
Forfeited, shares (in shares) | shares	(69,606)
Forfeited, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 4.20
Outstanding, shares (in shares) | shares	4,368,578
Outstanding, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 4.32