Note 20 - Fair Value Measurements - Schedule of Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Assets, fair value	$ 0	$ 140
Liabilities, fair value	607	3,698
Derivative Financial Instruments, Liabilities [Member] | PC1 Notes [Member]
Liabilities, fair value		1,288
Derivative Financial Instruments, Liabilities [Member] | Series A Preferred Stock [Member]
Liabilities, fair value	607	376
Contingent Liabilities [Member]
Liabilities, fair value		174
Warrant Liability [Member]
Liabilities, fair value		1,860
Fair Value, Inputs, Level 1 [Member]
Assets, fair value	0	140
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 1 [Member] | Derivative Financial Instruments, Liabilities [Member] | Series A Preferred Stock [Member]
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 2 [Member]
Assets, fair value	0	0
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 2 [Member] | Derivative Financial Instruments, Liabilities [Member] | Series A Preferred Stock [Member]
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 3 [Member]
Assets, fair value	0	0
Liabilities, fair value	607	3,698	$ 3,157
Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member] | PC1 Notes [Member]
Liabilities, fair value		1,288
Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member] | Series A Preferred Stock [Member]
Liabilities, fair value	607	376
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
Prepaid Expenses [Member]
Assets, fair value	0	140
Prepaid Expenses [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, fair value	0	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