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Redeemable Convertible Preferred Stock - Series A (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 5 Months Ended 8 Months Ended 9 Months Ended
Jun. 30, 2017
Sep. 30, 2017
Dec. 31, 2017
Sep. 30, 2018
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 6,685,082
Gross proceeds from Series A Preferred offering   $ 18,000  
Preferred stock, liquidation value     $ 20,698 21,598
Preferred stock, issued amount     19,004 21,161
Preferred stock, accrued dividends     643 1,543
Accretion of dividends as deemed     840 $ 2,097
IPO [Member] | Common Stock [Member]        
Share issue initial price per share       $ 3.00
Convertible preferred stock, terms       The Series A Preferred was converted to the Company's common shares as a result of its IPO in November 2018 (see Note 12).
Redeemable Convertible Preferred Stock [Member]        
Preferred stock, shares authorized       10,000,000
Preferred stock, par value $ 3.00     $ 0.001
Preferred stock, shares issued 6,685,082      
Gross proceeds from Series A Preferred offering $ 20,055      
Preferred stock, liquidation value     20,698 $ 21,598
Preferred stock, issued amount     20,055 20,055
Preferred stock, accrued dividends     $ 643 $ 1,543
Redeemable Convertible Preferred Stock [Member] | IPO [Member]        
Share issue initial price per share       $ 6.00
Percentage of common stock issue price for conversion       50.00%
Accretion of dividends as deemed       $ 2,534
Redeemable Convertible Preferred Stock- Series A [Member]        
Gross proceeds from Series A Preferred offering       $ 20,055