Note 3 - Related Party Transactions - Summary of Related Party Expenses (Details) - Crossing Bridge Advisor LLC [Member] - Cohanzick [Member] - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Employee Compensation and Benefit Expenses Allocated [Member]
Total allocated expenses	$ 284,850	$ 909,915
Owner Compensation and Benefit Expenses Allocated [Member]
Total allocated expenses	612,387	1,156,622
Other Allocated Expenses [Member]
Total allocated expenses	269,830	412,434
Sharing of Certain Staff, Office Facilities and Administrative Services [Member]
Total allocated expenses	$ 1,167,067	$ 2,478,971