Annual report pursuant to Section 13 and 15(d)

Stock Compensation (Schedule of Changes in Number of Outstanding Stock Options Under Director Plan, Stock Plan and 2011 Incentive Plan) (Details)

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Stock Compensation (Schedule of Changes in Number of Outstanding Stock Options Under Director Plan, Stock Plan and 2011 Incentive Plan) (Details) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Stock Compensation [Abstract]      
Options, Outstanding – December 31, 1,173,190 1,130,472  
Options, Awarded   191,301  
Options, Exercised (799,390) (8,000)  
Options, Forfeited (373,800) (140,583)  
Options, Outstanding – December 31,   1,173,190 1,130,472
Weighted average exercise price per share, Outstanding – December 31, $ 6.52 $ 7.28  
Weighted average exercise price per share, Awarded   5.10  
Weighted average exercise price per share, Exercised 4.70 2.64  
Weighted average exercise price per share, Forfeited $ 10.43 10.90  
Weighted average exercise price per share, Outstanding – December 31,   $ 6.52 $ 7.28
Weighted average remaining contractual term in years, Outstanding 0 years 3 years 4 months 6 days 3 years 5 months 23 days
Weighted average remaining contractual term in years, Exercisable 0 years    
Weighted average remaining contractual term in years, Options, Expected to vest 0 years