Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Shareholders’ Equity
Common stock, par value (in dollars per share)	$ 3.13	$ 3.13
Common stock, shares authorized (in shares)	8,000,000	8,000,000
Common stock, shares issued (in shares)	3,798,561	3,783,724
Common stock, shares outstanding (in shares)	3,798,561	3,783,724
Common stock, unvested shares (in shares)	8,621	20,352