Stockholders' Equity (Schedule of Stock-based Compensation) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	$ 689,130	$ 582,630
Employee stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	474,251	527,697
Employee stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	169,517	24,276
Non-employee stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	31,000	27,993
Non Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	$ 14,362	$ 2,664