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Balance Sheets Details - Other Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Components of other assets    
Equity method investments $ 5,961 $ 8,422
Value added tax receivable, long term 2,708 1,845
Other intangible assets 1,124 1,048
Other assets 10 672
Other assets, Total $ 9,803 $ 11,987