Note 5 - Loss Per Share (Details Textual) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 14, 2020
Common Stock, Shares, Outstanding, Ending Balance (in shares)	13,388,986		13,388,986		9,231,737	9,231,737
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	13,883,732	13,883,732	1,603,403	1,603,403
Share-based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	146,698	146,698	65,471	65,471
Earn-out Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)			1,000,000	1,000,000