Note 8 - Revenue From Contracts With Customers (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from Contract with Customer, Excluding Assessed Tax	$ 915,000	$ 836,000	$ 2,558,000	$ 2,482,000
Credit and Debit Card [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 308,000	$ 332,000	$ 934,000	$ 1,000,000

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details