Note 12 - Income Taxes - Reconciliation of Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Loss before income taxes	$ (14,685)	$ (51,971)
Tax at Canadian Rate	(3,891)	(13,772)
Difference in foreign tax rates	(77)	(1,315)
Non-deductible stock-based compensation	242	480
Non-deductible change in fair value of warrants	3	(3)
Non-deductible transaction costs	723	(0)
Non-deductible goodwill impairment	0	1,453
Other non-deductible items	15	0
Non-refundable federal investment tax credit	0	(642)
State non income taxes	1	0
Change in tax rates	(486)	0
Change in valuation allowance	1,635	4,263
Other	3	(6)
Total tax (benefit) expense	$ (1,832)	$ (9,542)