Note 4 - Property, Plant and Equipment (Details Textual) - USD ($)	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Depreciation, Depletion and Amortization	$ 218,000	$ 271,000
Finance Lease, Right-of-Use Asset, Amortization	6,000	$ 6,000
Construction in Progress, Gross	400,000
Machinery and Equipment [Member]
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	130,000		$ 136,000
Construction in Progress, Gross	104,000		$ 216,000
Building Improvements [Member]
Construction in Progress, Gross	71,000
Computer Equipment [Member]
Construction in Progress, Gross	$ 225,000

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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