Note 3 - Revenue - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Balance	$ 992	$ 1,157
Revenue recognized that was included in the contract liability at beginning of the year	(389)	(506)
Increase due to cash received, excluding amounts recognized as revenue during the year	125	341
Balance	$ 728	$ 992