Note 3 - Related Party Transactions - Summary of Related Party Expenses (Details) - Crossing Bridge Advisor LLC [Member] - Cohanzick [Member] - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Employee Compensation and Benefit Expenses Allocated [Member]
Total allocated expenses	$ 0	$ 426,996
Owner Compensation and Benefit Expenses Allocated [Member]
Total allocated expenses	0	329,647
Other Allocated Expenses [Member]
Total allocated expenses	0	127,195
Sharing of Certain Staff, Office Facilities and Administrative Services [Member]
Total allocated expenses	$ 0	$ 883,838