Note 4 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues	$ 3,239	$ 9,181	$ 13,190	$ 25,317
Transferred over Time [Member]
Revenues	3,239	9,156	12,440	25,242
Transferred at Point in Time [Member]
Revenues	0	25	750	75
Search Engine Marketing and Data Service [Member]
Revenues	3,239	9,011	12,440	24,815
Online Advertising Placement [Member]
Revenues	0	145	0	427
Blockchain-based SaaS services [Member]
Revenues	$ 0	$ 25	$ 750	$ 75

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details