Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($)  | 
12 Months Ended | |
|---|---|---|
Dec. 31, 2021  | 
Dec. 31, 2020  | 
|
| Realized gains on sales | $ 131,000 | $ 59,000 | 
| 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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