Annual report pursuant to Section 13 and 15(d)

Assets and Liabilities Measured at Fair Value (Details)

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Assets and Liabilities Measured at Fair Value (Details) - Recurring - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Assets and Liabilities Measured at Fair Value    
Cash equivalents $ 48,174 $ 67,329
Level 1    
Assets and Liabilities Measured at Fair Value    
Cash equivalents $ 48,174 $ 67,329