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Accrued Expenses and Other Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Other Liabilities Disclosure [Abstract]    
Accrued compensation costs $ 470 $ 810
Other accrued expenses and liabilities 696 843
Accrued dividends on Series A-2 Preferred Stock 8 99
Accrued expenses and other liabilities $ 1,174 $ 1,752