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Balance Sheets Details - Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Schedule of Inventory Components    
Raw materials $ 108 $ 108
Work in process 36 91
Finished goods 1,852 1,830
Total Inventories 1,996 2,029
Inventory net of reserves $ 1,200 $ 1,200