Note 5 - Fair Value of Financial Instruments - Assets Measured at Fair Value on Recurring Basis (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Fair Value	$ 22,574,681	$ 0
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Fair Value	17,601,081
US Treasury Securities [Member]
Fair Value	4,973,600
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Cash and cash equivalents	3,886,704
Fair Value	0
Total financial assets	3,886,704
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]
Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Cash and cash equivalents	994,427
Fair Value	22,574,681
Total financial assets	23,569,108
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Fair Value	17,601,081
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]
Fair Value	4,973,600
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Cash and cash equivalents	0
Fair Value	0
Total financial assets	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Fair Value	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]
Fair Value	0
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Cash and cash equivalents	3,886,704
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Cash and cash equivalents	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Cash and cash equivalents	0
Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Cash and cash equivalents	0
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Cash and cash equivalents	994,427
Commercial Paper [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Cash and cash equivalents	$ 0