Note 8 - Concentration Risk (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Accounts Receivable, Allowance for Credit Loss	$ 954,000	$ 42,000	$ 954,000	$ 42,000	$ 1,107,000	$ 37,000
Cash, Uninsured Amount	3.9		3.9		900,000
Short Term Deposits Held in Foreign Financial Institutions, Uninsured	$ 9.1		$ 9.1		$ 14,900,000
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Customers	2	3	2	3
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Microwave Ovens [Member]
Concentration Risk, Percentage	59.00%	53.00%	69.00%	49.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Audio Products [Member]
Concentration Risk, Percentage	37.00%	46.00%	25.00%	49.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Three Largest Customers [Member]
Concentration Risk, Percentage	69.00%			82.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Amazon [Member]
Concentration Risk, Percentage	54.00%	43.00%	39.00%	38.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Bi-Mart [Member]
Concentration Risk, Percentage	15.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Largest Customers [Member]
Concentration Risk, Percentage		92.00%	50.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Fred Meyer [Member]
Concentration Risk, Percentage			11.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Walmart [Member]
Concentration Risk, Percentage		25.00%		33.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Big Lots [Member]
Concentration Risk, Percentage		24.00%		11.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Number of Customers			2		2
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Amazon [Member]
Concentration Risk, Percentage			69.00%		59.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Bi-Mart [Member]
Concentration Risk, Percentage			12.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer One [Member]
Concentration Risk, Percentage			69.00%		59.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer Two [Member]
Concentration Risk, Percentage			12.00%		19.00%
Supplier Concentration Risk [Member] | Products for Resale [Member]
Number of Customers	4	4	3	5
Supplier Concentration Risk [Member] | Products for Resale [Member] | Four Largest Factory Suppliers [Member]
Concentration Risk, Percentage	100.00%	94.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier One [Member]
Concentration Risk, Percentage	34.00%	46.00%	35.00%	41.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier Two [Member]
Concentration Risk, Percentage	25.00%	22.00%	28.00%	19.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier Three [Member]
Concentration Risk, Percentage	23.00%	15.00%	25.00%	12.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier Four [Member]
Concentration Risk, Percentage	18.00%	11.00%		11.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Three Largest Factory Suppliers [Member]
Concentration Risk, Percentage			88.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Five Largest Factory Suppliers [Member]
Concentration Risk, Percentage				94.00%
Supplier Concentration Risk [Member] | Products for Resale [Member] | Supplier Five [Member]
Concentration Risk, Percentage				11.00%