Cash Equivalents and Investments - Schedule of Available-for-Sale Securities Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, unrealized loss position, Less than 12 months, Fair Value	$ 17,498
Available-for-sale securities, unrealized loss position, Less than 12 months, Unrealized Loss	(11)
Available-for-sale securities, unrealized loss position, Greater than 12 months, Fair Value	2,993
Available-for-sale securities, unrealized loss position, Greater than 12 months, Unrealized Loss	(8)
Available-for-sale securities, unrealized loss position, fair value	20,491
Available-for-sale securities, unrealized loss position, unrealized loss	19
U.S. government securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, unrealized loss position, Less than 12 months, Fair Value	5,977
Available-for-sale securities, unrealized loss position, Less than 12 months, Unrealized Loss	(1)
Available-for-sale securities, unrealized loss position, Greater than 12 months, Fair Value	0
Available-for-sale securities, unrealized loss position, Greater than 12 months, Unrealized Loss	0
Available-for-sale securities, unrealized loss position, fair value	5,977
Available-for-sale securities, unrealized loss position, unrealized loss	1
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities, unrealized loss position, Less than 12 months, Fair Value	11,521
Available-for-sale securities, unrealized loss position, Less than 12 months, Unrealized Loss	(10)
Available-for-sale securities, unrealized loss position, Greater than 12 months, Fair Value	2,993
Available-for-sale securities, unrealized loss position, Greater than 12 months, Unrealized Loss	(8)
Available-for-sale securities, unrealized loss position, fair value	14,514
Available-for-sale securities, unrealized loss position, unrealized loss	$ 18