Consolidated Statements of Changes in Shareholders' Equity (Parentheticals) - shares	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common Stock [Member]
Conversion of subordinated debt, shares (in shares)			36,922
Options exercised (in shares)	53,550	174,850	197,975
Conversion of subordinated debt, shares (in shares)		1,624,614
Options exercised (in shares)	53,550	174,850	197,975

Number of share options (or share units) exercised during the current period.

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