Note 8 - Stockholders' Equity - Schedule of Restricted Stock (Details) - Restricted Stock [Member]	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Non-vested, Shares (in shares)	96,557
Non-vested, Weighted Average Grant-Date Fair Value per Award (in dollars per share) | $ / shares	$ 2.33
Granted, Shares (in shares)	975,148
Granted, Weighted Average Grant-Date Fair Value per Award (in dollars per share) | $ / shares	$ 0.86
Vested, Shares (in shares)	(224,850)
Cancelled, Shares (in shares)	(92,017)
Non-vested, Shares (in shares)	754,838
Non-vested, Weighted Average Grant-Date Fair Value per Award (in dollars per share) | $ / shares	$ 1.20