Summary of Significant Accounting Policies - Schedule of Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value
Total assets measured at fair value	$ 14,669	$ 12,367
Warrant liability	31	33
Total liabilities measured at fair value	31	33
Level 1
Fair Value
Total assets measured at fair value	14,669	12,367
Level 3
Fair Value
Warrant liability	31	33
Total liabilities measured at fair value	31	33
Money market funds
Fair Value
Money market funds	14,669	12,367
Money market funds | Level 1
Fair Value
Money market funds	$ 14,669	$ 12,367