Note 3 - Property and Equipment - Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Property, Plant and Equipment, Gross	$ 242	$ 1,181
Less accumulated depreciation and amortization	(192)	(1,122)
Total property and equipment, net	50	59
Computer Equipment [Member]
Property, Plant and Equipment, Gross	137	132
Furniture and Fixtures [Member]
Property, Plant and Equipment, Gross	14	14
Leasehold Improvements [Member]
Property, Plant and Equipment, Gross	91	91
Software Development [Member]
Property, Plant and Equipment, Gross	$ 0	$ 944