Note L - Segment Information (Details Textual) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Assets	$ 41,579,000	$ 39,785,000
Operating Segments [Member] \| Merchant Investment [Member]
Assets	22,925,000
Operating Segments [Member] \| Electronic Instruments [Member]
Assets	1,221,000
Corporate, Non-Segment [Member]
Assets	$ 17,353,000

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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+ Details