Quarterly report pursuant to Section 13 or 15(d)

Leases - Schedule of Right-of-use Assets (Details)

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Leases - Schedule of Right-of-use Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Operating Leased Assets [Line Items]    
Less accumulated amortization $ (1,067) $ (986)
Operating lease right-of-use asset, net 484 531
Palo Alto, CA Office    
Operating Leased Assets [Line Items]    
Right-of-use asset, before accumulated amortization 630 630
Hyderabad, India Office    
Operating Leased Assets [Line Items]    
Right-of-use asset, before accumulated amortization 20 0
Ratingen, Germany Office    
Operating Leased Assets [Line Items]    
Right-of-use asset, before accumulated amortization 86 85
Berlin, Germany Office    
Operating Leased Assets [Line Items]    
Right-of-use asset, before accumulated amortization 516 508
Frankfurt, Germany Office    
Operating Leased Assets [Line Items]    
Right-of-use asset, before accumulated amortization $ 299 $ 294