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Summary of Significant Accounting Policies - Schedule of Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Details) - Recurring - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Fair Value    
Total assets measured at fair value $ 14,011 $ 12,367
Warrant liability 35 33
Total liabilities measured at fair value 35 33
Level 1    
Fair Value    
Total assets measured at fair value 14,011 12,367
Level 3    
Fair Value    
Warrant liability 35 33
Total liabilities measured at fair value 35 33
Money market funds    
Fair Value    
Money market funds 14,011 12,367
Money market funds | Level 1    
Fair Value    
Money market funds $ 14,011 $ 12,367