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Note 2 - Summary of Significant Accounting Policies (Details Textual)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Mar. 31, 2023
USD ($)
Accrued Payroll Taxes         $ 800
Revenue from Contract with Customer, Excluding Assessed Tax $ 31,245 $ 27,309 $ 87,541 $ 74,063  
Customer Refund Liability, Current $ 100 $ 100 $ 100 $ 100  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) | shares 2,266,667 2,431,681 2,266,667 2,431,681  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) | shares 0 5,960,593 0 5,960,593  
Restricted Cash, Current $ 205 $ 200 $ 205 $ 200 $ 240
Customer Concentration Risk [Member] | Accounts Receivable [Member]          
Number of Major Customers     1 1  
Customer Concentration Risk [Member] | Accounts Receivable [Member] | One Customer [Member]          
Concentration Risk, Percentage     29.00% 23.00%  
Common Stock Warrants [Member]          
Class of Warrant or Right, Outstanding (in shares) | shares 3,114,000 3,114,000 3,114,000 3,114,000  
Restricted Stock Units (RSUs) [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number (in shares) | shares 1,890,635 1,905,364 1,890,635 1,905,364  
Barter Transactions [Member]          
Revenue from Contract with Customer, Excluding Assessed Tax $ 3,100 $ 2,000 $ 10,700 $ 5,100