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Note 1 - Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Revenue from Contract with Customer, Excluding Assessed Tax	$ 9,070,000	$ 7,177,000
Increase Decrease in Long Term Lease Liabilities	136,000	(139,000)
Finance Lease, Noncurrent Principal Payments	(0)	2,000
Property, Plant and Equipment, Net	95,000	1,000
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	800	20,800
Contract with Customer, Refund Liability	67,000	83,000	$ 84,000
Sales Return Reserve, Period Increase (Decrease)	(16,000)	(1,000)
Advertising Expense	122,000	39,000
Unrecognized Tax Benefits, Income Tax Penalties Expense	0	0
Warrants and Rights Outstanding	0	0
Walmart [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,769,000	$ 3,042,000
Walmart [Member] \| Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration Risk, Percentage	34.00%	35.00%
Chedraui [Member] \| Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration Risk, Percentage	30.00%
Amazon [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,815,000	$ 1,644,000
Amazon [Member] \| Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration Risk, Percentage	25.00%	43.00%
Fred Meyer [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 889,000	$ 833,000
Fred Meyer [Member] \| Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration Risk, Percentage		11.00%
Computer Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Computer Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	7 years
Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life (Year)	7 years
Tools, Dies and Molds [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Previously Reported [Member]
Increase Decrease in Long Term Lease Liabilities		$ (141,000)
Finance Lease, Noncurrent Principal Payments		0
Revision of Prior Period, Adjustment [Member]
Increase Decrease in Long Term Lease Liabilities		139,000
Finance Lease, Noncurrent Principal Payments		2,000
License [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 218,000	372,000
License [Member] \| Previously Reported [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		1,102,000
License [Member] \| Revision of Prior Period, Adjustment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		372,000
Royalty [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 175,000	730,000
Royalty [Member] \| Revision of Prior Period, Adjustment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 730,000
Microwave Ovens [Member]
Product Warranty, Term (Year)	1 year
Audio Products [Member]
Product Warranty, Term (Year)	90 days