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Balance Sheet Information - Other Long-Term Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]    
Deferred rent $ 1,016 $ 634
Other long-term liabilities 341 404
Other Liabilities, Noncurrent $ 1,357 $ 1,038