Equity Plans and Share-Based Compensation (Share-based compensation cost by award type) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation cost	$ 170,446	$ 209,662	$ 538,365	$ 761,351
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation cost	96,911	104,939	298,455	379,607
Restricted Stock Units and Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation cost	$ 73,535	$ 104,723	$ 239,910	$ 381,744