Note 11 - Notes Receivable (Details Textual) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, before Allowance for Credit Loss, Total	$ 15,079,000	$ 10,996,000
Prime Rate [Member] \| Minimum [Member]
Loans Receivable, Basis Spread on Variable Rate	6.00%
Prime Rate [Member] \| Maximum [Member]
Loans Receivable, Basis Spread on Variable Rate	8.00%

The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin.

No definition available.

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Balance Type:	na
Period Type:	instant