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Stock-Based Compensation - Schedule of Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Stock-based compensation expense $ 31 $ 45
Stock Options [Member]    
Stock-based compensation expense 30 39
Restricted Stock Awards [Member]    
Stock-based compensation expense $ 1 $ 6