Note 1 - Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Revenues, Type	$ 9,070	$ 7,177
Walmart [Member]
Revenues, Type	4,769	3,042
Amazon [Member]
Revenues, Type	1,815	1,644
Fred Meyer [Member]
Revenues, Type	889	833
Three Largest Customers [Member]
Revenues, Type	7,473	5,519
Product [Member]
Revenues, Type	8,677	6,075
License [Member]
Revenues, Type	218	372
Royalty [Member]
Revenues, Type	$ 175	$ 730

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