Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - shares	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Purchase of treasury shares (in shares)	2,665	2,122	862

Number of shares that have been repurchased during the period and are being held in treasury.

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-Name Accounting Standards Codification
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Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration