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Investments - Schedule of Held-to-Maturity Investments (Details)
$ in Thousands
Sep. 30, 2020
USD ($)
Schedule of Held-to-maturity Securities [Line Items]  
Amortized Cost $ 38,055
Gross Unrealized Gains 10
Gross Unrealized Losses (33)
Estimated Fair Market Value 38,032
Corporate bonds  
Schedule of Held-to-maturity Securities [Line Items]  
Amortized Cost 38,055
Gross Unrealized Gains 10
Gross Unrealized Losses (33)
Estimated Fair Market Value $ 38,032