Note 1 - Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenues, Type	$ 6,310	$ 10,785
Amazon [Member]
Revenues, Type	2,656	4,156
Fred Meyer [Member]
Revenues, Type	839	0
Walmart [Member]
Revenues, Type	0	3,322
Three Largest Customers [Member]
Revenues, Type	3,495	7,478
Product [Member]
Revenues, Type	5,924	10,449
License [Member]
Revenues, Type	$ 386	$ 336