Note 1 - Background and Basis of Presentation - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Revenues, Type	$ 2,198	$ 1,809
Amazon [Member]
Revenues, Type	984	569
Walmart [Member]
Revenues, Type	848	819
Chedraui [Member]
Revenues, Type	264	0
Three Largest Customers [Member]
Revenues, Type	2,096	1,388
Product [Member]
Revenues, Type	2,129	1,732
License [Member]
Revenues, Type	$ 69	$ 77

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