Equity Plans and Share-Based Compensation (Share-based compensation cost by award type) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation cost	$ 196,359	$ 202,510	$ 457,500	$ 425,323
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation cost	121,497	83,247	286,997	215,539
Restricted Stock Units and Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation cost	$ 74,862	$ 119,263	$ 170,503	$ 209,784