Annual report pursuant to Section 13 and 15(d)

Property and Equipment, Net - Summary of Amortization Expense (Details)

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Property and Equipment, Net - Summary of Amortization Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Line Items]    
Total $ 355 $ 371
Cost of Revenue    
Property Plant And Equipment [Line Items]    
Total 302 315
Research and Development    
Property Plant And Equipment [Line Items]    
Total $ 53 $ 56