Note 5 - Segment Information - Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue	$ 4,497	$ 4,806	$ 13,173	$ 15,344
UNITED STATES
Revenue	3,464	3,746	10,507	12,187
CANADA
Revenue	1,033	1,021	2,626	3,055
Other Countries [Member]
Revenue	$ 0	$ 39	$ 40	$ 102

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).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details