Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Fair Value Measurements (Change in Fair Value) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Change in fair value $ 357 $ 36