Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Change in Fair Value) (Details)

v3.21.2
Fair Value Measurements (Change in Fair Value) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Change in fair value $ 1,000 $ (434) $ (1,400) $ 398