XML 57 R45.htm IDEA: XBRL DOCUMENT v3.23.1
Summary of significant accounting policies, Revenue recognition - Contract balances (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2022
Summary of significant accounting policies [Abstract]    
Revenue recognized $ 1,100  
Contract liabilities [Abstract]    
Unbilled receivables, current 314 $ 392
Unbilled receivables, non-current 308 163
Customer pre-payments (99) (101)
Deferred revenue, current (805) (1,329)
Deferred revenue, non-current (186) (143)
Net contract (liabilities) assets $ (468) $ (1,018)