Note 5 - Stockholders' Equity (Deficit) - Schedule of Black Pricing Model With Range of Inputs (Details) - Restricted Stock Units (RSUs) [Member]	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Unvested, shares (in shares) | shares	769,486
Unvested, Weighted average grant date fair value per share (in dollars per share) | $ / shares	$ 10.46
Granted, shares (in shares) | shares	478,000
Granted, Weighted average grant date fair value per share (in dollars per share) | $ / shares	$ 2.12
Vested (in shares) | shares	(234,239)
Vested, Weighted average grant date fair value per share (in dollars per share) | $ / shares	$ 9.53
Forfeited or expired, shares (in shares) | shares	(88,875)
Forfeited or expired, Weighted average grant date fair value per share (in dollars per share) | $ / shares	$ 8.36
Unvested, shares (in shares) | shares	924,372
Unvested, Weighted average grant date fair value per share (in dollars per share) | $ / shares	$ 6.55