Note 1 - Description of the Business, Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Prior Period Corrections (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
General and administrative expense	$ 1,662	$ 793	$ 3,461	$ 1,295
Research and development expense	$ 1,174	471	$ 2,128	839
General and Administrative and Research and Development Expense		1,264		2,134
Previously Reported [Member]
General and administrative expense		829		1,352
Research and development expense		435		782
General and Administrative and Research and Development Expense		1,264		2,134
Revision of Prior Period, Adjustment [Member]
General and administrative expense		(36)		(57)
Research and development expense		36		57
General and Administrative and Research and Development Expense		$ 0		$ 0