Note 1 - Background and Basis of Presentation - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Revenues, Type	$ 1,675	$ 2,198
Variety Wholesalers [Member]
Revenues, Type	455	0
Fred Meyer [Member]
Revenues, Type	433	0
Amazon [Member]
Revenues, Type	200	984
Walmart [Member]
Revenues, Type	0	848
Grupo Chedraui [Member]
Revenues, Type	0	264
Three Largest Customers [Member]
Revenues, Type	1,088	2,096
Product [Member]
Revenues, Type	1,589	2,129
License [Member]
Revenues, Type	$ 86	$ 69