Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Warrants (Details)

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Stockholders' Equity - Warrants (Details) - Warrants under National Securities, Inc Note - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Class of Warrant or Right [Line Items]    
Beginning Balance (in shares) 16,454  
Exercised (in shares) (613)  
Ending Balance (in shares) 15,841  
Aggregate Intrinsic Value $ 162 $ 148
Weighted Average    
Class of Warrant or Right [Line Items]    
Beginning Balance (in dollars per shares) $ 0.6079  
Exercised (in dollars per share) 0.0001  
Ending Balance (in dollars per shares) $ 0.6315