Note 8 - Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

March 31, 2021	Estimated Fair Value		Level 1		Level 2		Level 3
Assets:
Money market account	$	51,792,297	$	51,792,297	$	-	$	-

December 31, 2020	Estimated Fair Value		Level 1		Level 2		Level 3
Assets:
Money market account	$	1,789,401	$	1,789,401	$	-	$	-
Liabilities:
Common stock warrant liability	$	13,003,075	$	-	$	-	$	13,003,075

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Warrant Liability
Beginning balance	$	13,003,075
Reclassification to equity upon adoption of accounting standard		(13,003,075	)
Issuance of warrants		-
Change in fair value		-
Ending balance	$	-