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Summary of Significant Accounting Policies - Summary of Cash, Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Cash and cash equivalents
Cash	$ 51,560	$ 33,671
Money market accounts	146,477	158,438
U.S. Treasury securities		4,525
Total cash and cash equivalents	198,037	196,634
Marketable securities
Marketable securities	11,057	43,715
Corporate Bonds
Marketable securities
Marketable securities	2,013	13,613
U.S. Treasury Securities
Marketable securities
Marketable securities	$ 9,044	$ 30,102

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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