v3.25.2
Note 2 - Significant Accounting Policies (Details Textual)
12 Months Ended
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Cash, Uninsured Amount $ 0 $ 166,000
Asset Retirement Obligation 0 0
Contract with Customer, Liability, Revenue Recognized 45,000 26,000
Advertising Expense 1,123,000 1,308,000
Unrecognized Tax Benefits 0 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued $ 0 $ 0
Customer Concentration Risk [Member] | Revenue Benchmark [Member]    
Number of Major Customers 2 2
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Number 1 [Member]    
Concentration Risk, Percentage 31.00% 34.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Number 2 [Member]    
Concentration Risk, Percentage 10.00% 17.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Two Customers [Member]    
Concentration Risk, Percentage 61.00% 72.00%