Note 1 - Background and Basis of Presentation - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Revenues, Type	$ 1,891	$ 4,003	$ 4,781	$ 8,939
Amazon [Member]
Revenues, Type	1,023	1,714	1,903	3,406
Bi-Mart [Member]
Revenues, Type	285	0	0	0
Walmart [Member]
Revenues, Type	0	1,013	0	2,945
Big Lots [Member]
Revenues, Type	0	957	0	957
Fred Meyer [Member]
Revenues, Type	0	0	537	0
Three Largest Customers [Member]
Revenues, Type	1,308	3,684	2,440	7,308
Product [Member]
Revenues, Type	1,804	3,892	4,520	8,691
License [Member]
Revenues, Type	$ 87	$ 111	$ 261	$ 248