Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets:
Total	$ 612,279	$ 221,407
Money market accounts
Assets:
Money market accounts	612,279	221,407
Level 1
Assets:
Total	612,279	221,407
Level 1 | Money market accounts
Assets:
Money market accounts	612,279	221,407
Level 2
Assets:
Total	0	0
Level 2 | Money market accounts
Assets:
Money market accounts	0	0
Level 3
Assets:
Total	0	0
Level 3 | Money market accounts
Assets:
Money market accounts	$ 0	$ 0