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Liquidity, Going Concern and Management Plans (Details Narrative) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 30, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Cash and cash equivalents   $ 38,864           $ 38,864   $ 7,624  
Working capital deficit   (189,100)           (189,100)      
Accumulated deficit   (458,632)           (458,632)   (56,123)  
Net loss   $ (274,117) $ (73,604) $ (56,343) $ (6,909) $ (3,365) $ (2,867) $ (404,064) $ (13,141) $ (38,127) $ (129,312)
Subsequent Event [Member]                      
Proceeds from issuance of common stock, net of offering expenses $ 183