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Balance Sheet Components - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Payroll and related expenses $ 6,547 $ 4,565  
Inventory-raw materials 251 636  
Professional fees 109 279  
Deferred rent, current 490 666 $ 300
Other 526 457  
Accrued liabilities $ 7,923 $ 6,603