Note 12 - Risks and Uncertainties (Details Textual)		12 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Accounts Receivable, Allowance for Credit Loss, Current	$ 25,000	$ 25,000
Cash, Uninsured Amount	$ 19,600,000	$ 19,600,000	$ 25,000,000
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		83.00%	77.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Walmart [Member]
Concentration Risk, Percentage		53.00%	42.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Amazon [Member]
Concentration Risk, Percentage		20.00%	23.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Fred Meyer [Member]
Concentration Risk, Percentage		10.00%	12.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Walmart [Member]
Concentration Risk, Percentage		34.00%	35.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Amazon [Member]
Concentration Risk, Percentage		25.00%	43.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Fred Meyer [Member]
Concentration Risk, Percentage			11.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Chedraui [Member]
Concentration Risk, Percentage		30.00%
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Microwave Ovens [Member]
Concentration Risk, Percentage		33.00%	27.00%
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Audio Products [Member]
Concentration Risk, Percentage		66.00%	73.00%
Supplier Concentration Risk [Member] | Products for Resale [Member]
Number of Factory Suppliers			2
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier One [Member]
Concentration Risk, Percentage	38.00%	75.00%	75.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Two Largest Factory Suppliers [Member]
Concentration Risk, Percentage			95.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier Two [Member]
Concentration Risk, Percentage			20.00%
Sales Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Sales Representative Organizations		6	2
Sales Concentration Risk [Member] | Revenue Benchmark [Member] | Sales Representative Organizations One [Member]
Concentration Risk, Percentage		30.00%	38.00%