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Redeemable Convertible Preferred Stock - Series A (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 8 Months Ended 12 Months Ended
Nov. 30, 2018
Dec. 31, 2017
Dec. 31, 2018
Nov. 15, 2018
Jun. 30, 2017
Preferred stock, shares authorized   10,000,000 10,000,000    
Preferred stock, par value   $ 0.001 $ 0.001    
Preferred stock, shares issued   6,685,082    
Gross proceeds from Series A Preferred offering   $ 18,000    
Preferred stock, liquidation value   20,698 0    
Preferred stock, issued amount   19,004    
Preferred stock, accrued dividends   643 1,691    
Accretion of dividends as deemed   840 $ 2,534    
Initial Public Offering [Member]          
Share issue price per share $ 6.00   $ 3.00    
Beneficial conversion amount $ 21,747        
Common Stock [Member] | Initial Public Offering [Member]          
Share issue price per share     $ 3.00    
Redeemable Convertible Preferred Stock - Series A [Member]          
Preferred stock, shares authorized     10,000,000    
Preferred stock, par value     $ 0.001    
Preferred stock, shares issued         6,685,082
Share issue price per share         $ 3.00
Gross proceeds from Series A Preferred offering     $ 20,055    
Preferred stock, liquidation value   20,698      
Preferred stock, issued amount   20,055      
Preferred stock, accrued dividends   $ 643      
Redeemable Convertible Preferred Stock - Series A [Member] | Initial Public Offering [Member]          
Share issue price per share     $ 6.00    
Preferred stock, liquidation value       $ 21,746  
Preferred stock, issued amount       20,055  
Preferred stock, accrued dividends       $ 1,691  
Percentage of common stock issue price for conversion     50.00%    
Beneficial conversion amount     $ 21,747    
Accretion of dividends as deemed     $ 2,534