Note 2 - Significant Accounting Policies and Basis of Presentation - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Revenue	$ 845	$ 733
Software and Royalties [Member]
Revenue	141	39
Hardware and Consumables [Member]
Revenue	43	13
Service [Member]
Revenue	26	4
Maintenance [Member]
Revenue	$ 635	$ 677

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details