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Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]      
Total revenue $ 23,814 $ 17,646 $ 14,779
At One Point in Time      
Disaggregation of Revenue [Line Items]      
Total revenue 23,305 17,474 14,604
Over Time      
Disaggregation of Revenue [Line Items]      
Total revenue 509 172 175
IoT      
Disaggregation of Revenue [Line Items]      
Total revenue 23,198 16,867 14,317
IoT | Secure Chips      
Disaggregation of Revenue [Line Items]      
Total revenue 23,198 16,867 14,317
IoT | At One Point in Time      
Disaggregation of Revenue [Line Items]      
Total revenue 23,198 16,867 14,317
IoT | At One Point in Time | Secure Chips      
Disaggregation of Revenue [Line Items]      
Total revenue 23,198 16,867 14,317
mPKI      
Disaggregation of Revenue [Line Items]      
Total revenue 616 779 462
mPKI | Certificates      
Disaggregation of Revenue [Line Items]      
Total revenue 111 153 175
mPKI | Licenses and Integration      
Disaggregation of Revenue [Line Items]      
Total revenue 256 607 287
mPKI | SaaS, PCS and Hosting      
Disaggregation of Revenue [Line Items]      
Total revenue 249 19  
mPKI | At One Point in Time      
Disaggregation of Revenue [Line Items]      
Total revenue 107 607 287
mPKI | At One Point in Time | Licenses and Integration      
Disaggregation of Revenue [Line Items]      
Total revenue 107 607 287
mPKI | Over Time      
Disaggregation of Revenue [Line Items]      
Total revenue 509 172 175
mPKI | Over Time | Certificates      
Disaggregation of Revenue [Line Items]      
Total revenue 111 153 $ 175
mPKI | Over Time | Licenses and Integration      
Disaggregation of Revenue [Line Items]      
Total revenue 149    
mPKI | Over Time | SaaS, PCS and Hosting      
Disaggregation of Revenue [Line Items]      
Total revenue $ 249 $ 19