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Related Parties - 1347 Investors LLC (Details) - USD ($)
$ / shares in Units, $ in Millions
Nov. 19, 2019
Sep. 30, 2019
Mar. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]        
Consideration received, cash $ 0.6 $ 0.6    
Consideration received (in shares) 594,750 594,750    
Consideration received, warrants (in shares) 400,000 400,000    
Warrant exercise price (in dollars per share) $ 15 $ 15    
Limited Liability Company        
Related Party Transaction [Line Items]        
Equity method investment, ownership percentage     0.00% 0.00%
Equity Method Investee        
Related Party Transaction [Line Items]        
Equity method investment, ownership percentage     100.00% 100.00%