Shareholders' Equity Options (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	48,987
Proceeds from exercise of options	$ 271,008	$ 150,658	$ 0
Maximum [Member]
Class of Stock [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 6.20
Minimum [Member]
Class of Stock [Line Items]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 5.20