v3.26.1
Note 1 - General Information - Revenue by Product (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Revenue $ 343 $ 534 $ 787 $ 829
Product [Member]        
Revenue 147 348 220 543
Training [Member]        
Revenue 0 0 20 0
Grant [Member]        
Revenue (41) 68 205 94
Service [Member]        
Revenue 217 56 294 84
Warranty [Member]        
Revenue $ 20 $ 62 $ 48 $ 108