Consolidated Statements of Comprehensive Income (Losses) (Unaudited) (Parentheticals) - USD ($) $ in Thousands  | 
3 Months Ended | |
|---|---|---|
Mar. 31, 2022  | 
Mar. 31, 2021  | 
|
| Realized gains on sales | $ 0 | $ 0 | 
| X | ||||||||||
- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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