Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accrued Liabilities
Employee bonuses	$ 674	$ 1,437
Accrued professional fees and other	616	367
Total accrued liabilities	$ 1,290	$ 1,804

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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