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Revenue and related accounts -Schedule of revenue disaggregated by customer (Details) - USD ($)
3 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Revenue and related accounts    
Revenue $ 5,153,000 $ 6,628,000
Supermarket    
Revenue and related accounts    
Revenue 4,874,000 5,611,000
Wholesaler    
Revenue and related accounts    
Revenue 259,000 792,000
Other    
Revenue and related accounts    
Revenue $ 20,000 $ 225,000