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Short-term Investments Short-term Investments - Summary of Investments in a Continuous Loss Position (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Debt Securities, Available-for-sale [Line Items]  
Less Than 12 Months, Fair value $ 2,515
Less Than 12 Months, Gross unrealized loss 2
12 Months or Greater, Fair value 0
12 Months or Greater, Gross unrealized losses 0
Total, Fair value 2,515
Total, Gross unrealized losses (2)
Corporate debt securities  
Debt Securities, Available-for-sale [Line Items]  
Less Than 12 Months, Fair value 2,515
Less Than 12 Months, Gross unrealized loss 2
12 Months or Greater, Fair value 0
12 Months or Greater, Gross unrealized losses 0
Total, Fair value 2,515
Total, Gross unrealized losses $ (2)