Note 14 - Concentrations - Summary of Net Equipment by Geographic Area (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Property, Plant, and Equipment Concentration	$ 1,261,000	$ 1,424,000
Geographic Concentration Risk [Member] \| UNITED STATES
Property, Plant, and Equipment Concentration	647,000	810,000
Geographic Concentration Risk [Member] \| COSTA RICA
Property, Plant, and Equipment Concentration	292,000	390,000
Geographic Concentration Risk [Member] \| INDIA
Property, Plant, and Equipment Concentration	139,000	169,000
Geographic Concentration Risk [Member] \| All Other Countries [Member]
Property, Plant, and Equipment Concentration	$ 183,000	$ 55,000

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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