v3.26.1
Segment information (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
USD ($)
segment
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Operating segments [Abstract]      
Number of operating segments | segment 1    
Disclosure of geographical areas [line items]      
Product revenue $ 26,325 $ 36,831 $ 33,616
Cellular IoT systems      
Disclosure of geographical areas [line items]      
Product revenue 22,709 36,831 33,616
Radio transceivers for all wireless systems      
Disclosure of geographical areas [line items]      
Product revenue 3,616 0 0
Products | Goods or services transferred at point in time [member]      
Disclosure of geographical areas [line items]      
Product revenue 15,489 12,007 8,060
license fee | Goods or services transferred at point in time [member]      
Disclosure of geographical areas [line items]      
revenue from sales of other services 8,036 19,353 2,846
license fee | Goods or services transferred over time [member]      
Disclosure of geographical areas [line items]      
revenue from sales of other services 0 3,230 20,151
Development and other services transferred over time | Goods or services transferred at point in time [member]      
Disclosure of geographical areas [line items]      
revenue from sales of license 1,164 0 23
Development and other services transferred over time | Goods or services transferred over time [member]      
Disclosure of geographical areas [line items]      
revenue from sales of license 1,062 2,241 2,536
Royalties      
Disclosure of geographical areas [line items]      
revenue from sales of license 574 0 0
Total Asia      
Disclosure of geographical areas [line items]      
Product revenue 10,550 12,669 21,823
Taiwan      
Disclosure of geographical areas [line items]      
Product revenue 893 468 29
China      
Disclosure of geographical areas [line items]      
Product revenue 7,261 11,458 21,702
Rest of Asia      
Disclosure of geographical areas [line items]      
Product revenue 436 47 43
Germany      
Disclosure of geographical areas [line items]      
Product revenue 629 687 1,001
China      
Disclosure of geographical areas [line items]      
Product revenue 9,248 20,368 8,666
Rest of world (no single country representing more than 10%)      
Disclosure of geographical areas [line items]      
Product revenue 2,941 1,702 841
Japan      
Disclosure of geographical areas [line items]      
Product revenue 1,960 696 49
FRANCE      
Disclosure of geographical areas [line items]      
Product revenue $ 2,957 $ 1,405 $ 1,285
Revenue Risk [Member] | International      
Disclosure of geographical areas [line items]      
Concentration Risk, Percentage 88.80% 96.20% 96.20%