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BALANCE SHEET DETAILS - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Other current liabilities: |  |
Accrued contract costs |  | $ 140
Warranty costs | $ 54 | 90
Accrued professional fees | 685 | 1,074
Accrued other taxes | 376 | 1,063
Other | 2,930 | 2,381
Total other current liabilities | $ 4,045 | $ 4,748

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