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Marketable Securities - Gross Unrealized Losses and Fair Value of Available-For-Sale Debt Securities (Details)
$ in Thousands
Jun. 30, 2020
USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]  
Fair Value $ 3,693
Unrealized Losses 8
Corporate bonds  
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]  
Fair Value 3,187
Unrealized Losses 7
Other fixed-income securities  
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]  
Fair Value 506
Unrealized Losses $ 1