Summary of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Cash And Cash Equivalents [Line Items]
Total cash and cash equivalents	$ 53,774	$ 38,220
Cash
Cash And Cash Equivalents [Line Items]
Total cash and cash equivalents	250	471
U.S. Treasury securities
Cash And Cash Equivalents [Line Items]
Total cash and cash equivalents		35
Commercial Paper
Cash And Cash Equivalents [Line Items]
Total cash and cash equivalents		5,974
Money Market Funds
Cash And Cash Equivalents [Line Items]
Total cash and cash equivalents	39,524	$ 31,740
Repurchase Agreements
Cash And Cash Equivalents [Line Items]
Total cash and cash equivalents	$ 14,000