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Fair Value Measurements Fair Value Measurements - Roll Forward of Preferred Stock Derivative (Details) - Significant Unobservable Inputs (Level 3)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning balance $ 2,295
Change in fair value (60)
Other 239
Ending balance $ 2,474