Note 2 - Subordinated Notes Receivable (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 06, 2018	Mar. 31, 2018
Financing Receivable, after Allowance for Credit Loss, Total						$ 7,400,000
A&R Note [Member]
Financing Receivable, before Allowance for Credit Loss, Total					$ 3,300,000
S&L Note [Member]
Financing Receivable, before Allowance for Credit Loss, Total					$ 4,400,000
Notes Receivable, Interest Rate					10.00%
Proceeds from Interest Received			$ 0	$ 0
Proceeds from Collection of Finance Receivables		$ 63,000		$ 170,000
Financing Receivable, Credit Loss, Expense (Reversal)	$ 146,000