Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Stock-Based Compensation (Schedule of Changes in Number of Outstanding Stock Options Under Director Plan, Stock Plan and 2011 Incentive Plan) (Details) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Stock-Based Compensation [Abstract]    
Options, Outstanding - December 31, 2019 1,130,472  
Options, Awarded  
Options, Exercised  
Options, Forfeited (28,369)  
Options, Outstanding - March 31, 2020 1,102,103 1,130,472
Options, Exercisable at March 31, 2020 922,192  
Options, Expected to vest March 31, 2020 1,102,103  
Weighted average exercise price per share, Outstanding - December 31, 2019 $ 7.28  
Weighted average exercise price per share, Awarded  
Weighted average exercise price per share, Exercised  
Weighted average exercise price per share, Forfeited 10.66  
Weighted average exercise price per share, Outstanding - March 31, 2020 7.20 $ 7.28
Weighted average exercise price per share, Exercisable at March 31, 2020 7.93  
Weighted average exercise price per share, Expected to vest March 31, 2020 $ 7.20  
Options, Outstanding - Weighted average remaining contractual term in years 3 years 3 months 22 days 3 years 5 months 23 days
Options, Exercisable - Weighted average remaining contractual term in years 2 years 11 months 9 days  
Options, Expected to vest - Weighted average remaining contractual term in years 3 years 3 months 22 days