Note 2 - Summary of Significant Accounting Policies (Details Textual)	3 Months Ended
Jun. 30, 2025 USD ($) shares	Jun. 30, 2024 USD ($) shares	Mar. 31, 2025 USD ($)
Revenue from Contract with Customer, Excluding Assessed Tax	$ 19,207,000	$ 33,078,000
Customer Refund Liability, Current	$ 100,000	$ 100,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) \| shares	2,197,917	2,251,667
Restricted Cash, Current	$ 30,000		$ 30,000
Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Number of Major Customers	0	1
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| One Customer [Member]
Concentration Risk, Percentage		29.00%
Common Stock Warrants [Member]
Class of Warrant or Right, Outstanding (in shares) \| shares	3,114,001	3,114,001
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number (in shares) \| shares	433,850	1,726,237
Barter Transactions [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 7,000,000	$ 6,000,000

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Current regulatory liabilities generally represent obligations to make refunds to customers for various reasons including overpayment.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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