Fair Value Measurements - Summary of Financial Assets and Liabilities to Fair Value Measurement On Recurring Basis and Level of Input Measurement (Details) - Fair Value, Recurring Basis - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financial assets:
Fair value measurements	$ 211,657	$ 229,513
Financial liabilities:
Derivative liability	930	1,264
Total financial liabilities	930	1,264
Level 1
Financial assets:
Fair value measurements	95,221	157,780
Financial liabilities:
Derivative liability	0	0
Total financial liabilities	0	0
Level 2
Financial assets:
Fair value measurements	116,436	71,733
Financial liabilities:
Derivative liability	0	0
Total financial liabilities	0	0
Level 3
Financial assets:
Fair value measurements	0	0
Financial liabilities:
Derivative liability	930	1,264
Total financial liabilities	930	1,264
Money Market Fund
Financial assets:
Fair value measurements	89,221	127,783
Money Market Fund | Level 1
Financial assets:
Fair value measurements	89,221	127,783
Money Market Fund | Level 2
Financial assets:
Fair value measurements	0	0
Money Market Fund | Level 3
Financial assets:
Fair value measurements	0	0
U.S. treasury bills
Financial assets:
Fair value measurements	6,000	29,997
U.S. treasury bills | Level 1
Financial assets:
Fair value measurements	6,000	29,997
U.S. treasury bills | Level 2
Financial assets:
Fair value measurements	0	0
U.S. treasury bills | Level 3
Financial assets:
Fair value measurements	0	0
Corporate Debt Securities
Financial assets:
Fair value measurements	6,506	23,201
Corporate Debt Securities | Level 1
Financial assets:
Fair value measurements	0	0
Corporate Debt Securities | Level 2
Financial assets:
Fair value measurements	6,506	23,201
Corporate Debt Securities | Level 3
Financial assets:
Fair value measurements	0	0
Commercial Paper
Financial assets:
Fair value measurements	104,892	41,460
Commercial Paper | Level 1
Financial assets:
Fair value measurements	0	0
Commercial Paper | Level 2
Financial assets:
Fair value measurements	104,892	41,460
Commercial Paper | Level 3
Financial assets:
Fair value measurements	0	0
U.S. Government Bonds
Financial assets:
Fair value measurements	5,038	5,066
U.S. Government Bonds | Level 1
Financial assets:
Fair value measurements	0	0
U.S. Government Bonds | Level 2
Financial assets:
Fair value measurements	5,038	5,066
U.S. Government Bonds | Level 3
Financial assets:
Fair value measurements	$ 0	0
Asset Backed Securities
Financial assets:
Fair value measurements		2,006
Asset Backed Securities | Level 1
Financial assets:
Fair value measurements		0
Asset Backed Securities | Level 2
Financial assets:
Fair value measurements		2,006
Asset Backed Securities | Level 3
Financial assets:
Fair value measurements		$ 0