v3.25.2
Note 13 - Segment Reporting, Product Line and Geographic Information - Sales by Geographic Region (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Net sales $ 24,215 $ 23,071
Geographic Concentration Risk [Member]    
Net sales [1] $ 24,215 $ 23,071
Net sales, percent [1] 100.00% 100.00%
Geographic Concentration Risk [Member] | UNITED STATES    
Net sales [1] $ 19,051 $ 18,886
Net sales, percent [1] 79.00% 82.00%
Geographic Concentration Risk [Member] | Asia Pacific [Member]    
Net sales [1] $ 1,061 $ 1,247
Net sales, percent [1] 4.00% 5.00%
Geographic Concentration Risk [Member] | Europe [Member]    
Net sales [1] $ 2,638 $ 1,596
Net sales, percent [1] 11.00% 7.00%
Geographic Concentration Risk [Member] | Other Countries [Member]    
Net sales [1] $ 1,465 $ 1,342
Net sales, percent [1] 6.00% 6.00%
[1] Net sales are attributed to countries based on location of customer.