Note 8 - Concentration Risk (Details Textual)	3 Months Ended		12 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2024 USD ($)
Cash, Uninsured Amount	$ 2.5		$ 19.6
Maximum [Member]
Cash, FDIC Insured Amount		$ 250,000
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Customers	3	3
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Three Largest Customers [Member]
Concentration Risk, Percentage	86.00%	88.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Amazon [Member]
Concentration Risk, Percentage	38.00%	28.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Walmart [Member]
Concentration Risk, Percentage	36.00%	43.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Chedraui [Member]
Concentration Risk, Percentage	12.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Fred Meyer [Member]
Concentration Risk, Percentage		17.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Number of Customers			3
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer One [Member]
Concentration Risk, Percentage	50.00%		34.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer Two [Member]
Concentration Risk, Percentage	21.00%		30.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer Three [Member]
Concentration Risk, Percentage	20.00%		25.00%
Product Concentration Risk [Member] | Revenue, Product and Service Benchmark [Member] | Microwave Ovens [Member]
Concentration Risk, Percentage	48.00%	39.00%
Product Concentration Risk [Member] | Revenue, Product and Service Benchmark [Member] | Audio Products [Member]
Concentration Risk, Percentage	48.00%	60.00%
Supplier Concentration Risk [Member] | Products for Resale [Member]
Number of Factory Suppliers	4	3
Supplier Concentration Risk [Member] | Products for Resale [Member] | Four Largest Factory Suppliers [Member]
Concentration Risk, Percentage	100.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Largest Supplier [Member]
Concentration Risk, Percentage	33.00%	57.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier One [Member]
Concentration Risk, Percentage	31.00%	22.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier Two [Member]
Concentration Risk, Percentage	21.00%	21.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier Three [Member]
Concentration Risk, Percentage	15.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Three Largest Factory Suppliers [Member]
Concentration Risk, Percentage		100.00%