Note 6 - Intangible assets and Goodwill- Schedule of Intangible Assets in Process Research and Development (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net, Beginning Balance	$ 41,128	$ 69,810
Impairment	0	(28,682)
Finite-Lived Intangible Assets, Net, Ending Balance	41,128	41,128
GTX 104 [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net, Beginning Balance	27,595	27,595
Impairment	0	0
Finite-Lived Intangible Assets, Net, Ending Balance	27,595	27,595
GTX 102 [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net, Beginning Balance	9,196	31,908
Impairment	0	(22,712)
Finite-Lived Intangible Assets, Net, Ending Balance	9,196	9,196
GTX 101 [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net, Beginning Balance	4,337	10,307
Impairment	0	(5,970)
Finite-Lived Intangible Assets, Net, Ending Balance	$ 4,337	$ 4,337