Summary of Significant Accounting Policies - Schedule of Financial Assets and Liabilities Measured and Recognized at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets:
Money market funds	$ 79,682	$ 85,625
Investment in Tyme	12,200
Total financial assets	91,882	85,625
Level 1
Assets:
Money market funds	79,682	85,625
Investment in Tyme	12,200
Total financial assets	91,882	85,625
Level 2
Assets:
Money market funds	0	0
Investment in Tyme	0
Total financial assets	0	0
Level 3
Assets:
Money market funds	0	0
Investment in Tyme	0
Total financial assets	$ 0	$ 0