v3.26.1
Note 6 - Property, Plant and Equipment (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Construction in Progress, Gross $ 934 $ 135
Depreciation 3,700 $ 3,200
Sinton, TX Facility Expansion [Member]    
Construction in Progress, Gross $ 600