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Prepaid Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Prepaid Expenses [Abstract]      
Prepaid expenses and other   $ 17 $ 4
Prepaid investor relations   6 6
Prepaid consulting fees $ 57 9  
Prepaid legal fees 50 0  
Prepaid Nasdaq fees 22 0  
Prepaid Advertising 40 6  
Prepaid other expenses 18 8  
Total prepaid expenses $ 187 $ 23 $ 10