Supplemental Balance Sheet Information - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued payroll	$ 500	$ 100
Other current liabilities	1,300	1,400
Total other current liabilities	$ 1,800	$ 1,500

Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.

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