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Fair Value Measurements - Reconciliation of Changes in Fair Value of Financial Assets and Liabilities Classified as Level 3 (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy      
Balance at beginning of period $ 24 $ 0 $ 22
Total gain (loss) included in earnings (532) 41 25
Settlement (gain) loss 356 (17) (47)
Transfers in and/or out of Level 3 0 0 0
Balance at end of period (152) 24 0
Change in unrealized gains (losses) relating to assets and liabilities still held at the end of the period $ (154) $ 24 $ 0