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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

X

- 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

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X

- Definition

Fair value of financial and nonfinancial obligations.

+ 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
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