Fair Value Measurements (Narrative) (Details) - USD ($) |
3 Months Ended | ||
---|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
Dec. 31, 2020 |
|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
Transfers of assets and liabilities between level 1, 2, 3 | $ 0 | $ 0 | |
Recurring [Member] | |||
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
Financial liabilities | $ 483,000 | $ 430,000 |