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Note 17 - Fair Value Measurements - Schedule of Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands | Sep. 30, 2023 | Mar. 31, 2023
--- | --- | ---
Assets, fair value | $ 76 | $ 140
Liabilities, fair value | 127 | 3,698
Contingent Liabilities [Member] |  |
Liabilities, fair value |  | 174
Warrant Liability [Member] |  |
Liabilities, fair value |  | 1,860
Derivative Financial Instruments, Liabilities [Member] | Series A Preferred Stock [Member] |  |
Liabilities, fair value | 127 | 376
Derivative Financial Instruments, Liabilities [Member] | PC1 Notes [Member] |  |
Liabilities, fair value |  | 1,288
Fair Value, Inputs, Level 1 [Member] |  |
Assets, fair value | 76 | 140
Liabilities, fair value | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Contingent Liabilities [Member] |  |
Liabilities, fair value |  | 0
Fair Value, Inputs, Level 1 [Member] | Warrant Liability [Member] |  |
Liabilities, fair value |  | 0
Fair Value, Inputs, Level 1 [Member] | Derivative Financial Instruments, Liabilities [Member] | Series A Preferred Stock [Member] |  |
Liabilities, fair value | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Derivative Financial Instruments, Liabilities [Member] | PC1 Notes [Member] |  |
Liabilities, fair value |  | 0
Fair Value, Inputs, Level 2 [Member] |  |
Assets, fair value | 0 | 0
Liabilities, fair value | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Contingent Liabilities [Member] |  |
Liabilities, fair value |  | 0
Fair Value, Inputs, Level 2 [Member] | Warrant Liability [Member] |  |
Liabilities, fair value |  | 0
Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member] | Series A Preferred Stock [Member] |  |
Liabilities, fair value | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member] | PC1 Notes [Member] |  |
Liabilities, fair value |  | 0
Fair Value, Inputs, Level 3 [Member] |  |
Assets, fair value | 0 | 0
Liabilities, fair value | 127 | 3,698
Fair Value, Inputs, Level 3 [Member] | Contingent Liabilities [Member] |  |
Liabilities, fair value |  | 174
Fair Value, Inputs, Level 3 [Member] | Warrant Liability [Member] |  |
Liabilities, fair value |  | 1,860
Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member] | Series A Preferred Stock [Member] |  |
Liabilities, fair value | 127 | 376
Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member] | PC1 Notes [Member] |  |
Liabilities, fair value |  | 1,288
Prepaid Expenses [Member] |  |
Assets, fair value | 76 | 140
Prepaid Expenses [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets, fair value | 76 | 140
Prepaid Expenses [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets, fair value | 0 | 0
Prepaid Expenses [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets, fair value | $ 0 | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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