Stock-based Compensation (Schedule of Information Relating to Stock Options Outstanding) (Details)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number Outstanding | shares	571,600
Options Outstanding, Weighted Average Remaining Contractual Term	7 years 9 months
Options Outstanding, Weighted Average Exercise Price	$ 9.71
Options Exercisable, Number Exercisable | shares	164,167
Options Exercisable, Weighted Average Exercise Price	$ 6.95
Exercise Price Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	3.88
Range of Exercise Price Maximum	$ 4.80
Options Outstanding, Number Outstanding | shares	111,700
Options Outstanding, Weighted Average Remaining Contractual Term	6 years 2 months 19 days
Options Outstanding, Weighted Average Exercise Price	$ 4.28
Options Exercisable, Number Exercisable | shares	85,000
Options Exercisable, Weighted Average Exercise Price	$ 4.41
Exercise Price Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	5.05
Range of Exercise Price Maximum	$ 6.03
Options Outstanding, Number Outstanding | shares	22,500
Options Outstanding, Weighted Average Remaining Contractual Term	1 year 5 months 16 days
Options Outstanding, Weighted Average Exercise Price	$ 5.32
Options Exercisable, Number Exercisable | shares	22,500
Options Exercisable, Weighted Average Exercise Price	$ 5.32
Exercise Price Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	6.87
Range of Exercise Price Maximum	$ 6.87
Options Outstanding, Number Outstanding | shares	96,000
Options Outstanding, Weighted Average Remaining Contractual Term	7 years 3 months 14 days
Options Outstanding, Weighted Average Exercise Price	$ 6.87
Options Exercisable, Number Exercisable | shares	13,800
Options Exercisable, Weighted Average Exercise Price	$ 6.87
Exercise Price Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	8.17
Range of Exercise Price Maximum	$ 12.32
Options Outstanding, Number Outstanding | shares	82,000
Options Outstanding, Weighted Average Remaining Contractual Term	8 years 6 months 4 days
Options Outstanding, Weighted Average Exercise Price	$ 11.22
Options Exercisable, Number Exercisable | shares	600
Options Exercisable, Weighted Average Exercise Price	$ 8.17
Exercise Price Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	12.50
Range of Exercise Price Maximum	$ 12.50
Options Outstanding, Number Outstanding | shares	201,400
Options Outstanding, Weighted Average Remaining Contractual Term	8 years 2 months 8 days
Options Outstanding, Weighted Average Exercise Price	$ 12.50
Options Exercisable, Number Exercisable | shares	37,600
Options Exercisable, Weighted Average Exercise Price	$ 12.50
Exercise Price Range Six [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price Minimum	13.61
Range of Exercise Price Maximum	$ 18.36
Options Outstanding, Number Outstanding | shares	58,000
Options Outstanding, Weighted Average Remaining Contractual Term	11 years 3 months
Options Outstanding, Weighted Average Exercise Price	$ 14.74
Options Exercisable, Number Exercisable | shares	4,667
Options Exercisable, Weighted Average Exercise Price	$ 16.32