v3.26.1
Note 3 - Revenue Recognition - Revenues by Major Customers (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]
3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Inox Wind Limited [Member] | Wind [Member]    
Concentration percentage 19.00% 21.00%
Fuji Bridex Pte Ltd [Member] | Grid [Member] | Maximum [Member]    
Concentration percentage 10.00% 16.00%