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Balance sheet details - Schedule of Prepaid expenses and other current assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Prepaid expenses:    
Prepaid software $ 531 $ 469
Prepaid rent 151 187
Prepaid commissions 84 102
Prepaid services 125 179
Other 156 133
Other current assets:    
Security deposits 52 173
Unbilled receivables 17 10
Total prepaid expenses and other current assets $ 1,116 $ 1,253