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Revenue - Schedule of Contract Assets, Deferred Revenue and Contract Liability (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Trade accounts receivables    
Total trade accounts receivables $ 2,463 $ 2,820
Total contract assets (0) (0)
Contract liabilities - current 105 128
Contract liabilities - noncurrent 8 57
Total contract liabilities 113 185
Deferred revenue    
Total deferred revenue 197 192
Revenue from continuing operations recognized in the period from amounts included in the deferred revenue at the beginning of the year 209 290
IoT    
Trade accounts receivables    
Total trade accounts receivables 2,269 2,655
mPKI    
Trade accounts receivables    
Total trade accounts receivables 194 165
Deferred revenue    
Total deferred revenue $ 197 $ 192