Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies - Fair Value of Warrant and Derivative Liability (Details)

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Organization and Summary of Significant Accounting Policies - Fair Value of Warrant and Derivative Liability (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2020
Jun. 30, 2020
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]    
Reclassification of warrants to additional paid-in capital $ (2,897)  
Warrant Liability    
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]    
Fair value, beginning of period $ 320 $ 320
Issuance of warrants   1,654
Change in fair value   923
Reclassification of warrants to additional paid-in capital   $ (2,897)