Quarterly report pursuant to Section 13 or 15(d)

Series A Convertible Preferred Stock (Details)

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Series A Convertible Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Class of Stock [Line Items]      
Aggregate cash proceeds amount   $ 9,564  
Preferred stock, par or stated value per share $ 0.0001    
Restricted cash $ 5,500    
Operating account $ 740    
Preferred stock to be issued (in shares) 100,000,000    
Preferred stock, shares outstanding (in shares) 0   6,000
Convertible Preferred Stock      
Class of Stock [Line Items]      
Issued shares of preferred stock (in shares) 6,000    
Aggregate cash proceeds amount $ 6,000    
Preferred stock, par or stated value per share $ 1,000    
Security deposit $ 5,500    
Proceeds into restricted escrow account $ 6,000    
Conversion price (in dollars per share) $ 11.50    
Series A Preferred Stock      
Class of Stock [Line Items]      
Aggregate cash proceeds amount $ 6,000    
Shares redeemed (in shares) 6,000    
Total proceeds issue price $ 6,240    
Dividends $ 240    
30 Day Anniversary | Convertible Preferred Stock      
Class of Stock [Line Items]      
Percentage of shares mandatorily redeemable 104.00%    
Shares mandatorily redeemable (in shares) 3,000    
60 Day Anniversary | Convertible Preferred Stock      
Class of Stock [Line Items]      
Percentage of shares mandatorily redeemable 104.00%    
Shares mandatorily redeemable (in shares) 2,500    
90 Day Anniversary | Convertible Preferred Stock      
Class of Stock [Line Items]      
Percentage of shares mandatorily redeemable 104.00%    
Shares mandatorily redeemable (in shares) 500