Share-Based Compensation (Schedule of Non-Vested Share Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested stock options, January 1	473,851
Non-vested stock options, December 31	431,844	473,851
Weighted Average Grant Date Fair Value, Non-vested stock options, January 1	$ 5.64
Weighted Average Grant Date Fair Value Per Share, Options granted	5.57	$ 6.30	$ 4.49
Weighted Average Grant Date Fair Value, Non-vested stock options, December 31	$ 5.79	$ 5.64
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	319,669	685,334	560,000
Options vested	(495,675)
Non-vested options canceled	(16,669)
Weighted Average Grant Date Fair Value Per Share, Options granted	$ 5.52
Weighted Average Grant Date Fair Value Per Share, Options vested	5.42
Weighted Average Grant Date Fair Value Per Share, Options canceled	$ 6.12
Two Thousand Nineteen Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	272,331
Options vested	(88,665)
Non-vested options canceled	(32,998)
Weighted Average Grant Date Fair Value Per Share, Options granted	$ 5.63
Weighted Average Grant Date Fair Value Per Share, Options vested	5.63
Weighted Average Grant Date Fair Value Per Share, Options canceled	$ 5.55