Summary of Significant Accounting Policies (Summary of Stock-Based Compensation) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Summary Of Significant Accounting Policies [Abstract]
Stock based compensation expense recognized	$ 237,000	$ 290,000
Number of unvested stock options (in shares)	893,563	795,600
Fair value of unvested stock options	1,210,840	1,426,878
Amount remaining to be recognized as expense	$ 597,709	$ 548,287