Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Net operating loss ("NOLs") carry forwards	$ 61,590,084	$ 58,334,073
Fixed assets/intangibles	148,395	114,826
Research and development credits/loss carry forwards	1,726	3,278,995
Share-based compensation	3,368,571	3,047,573
Accrued expenses and other	859,358	2,789,776
Total deferred tax assets	65,968,134	67,565,243
Deferred tax liabilities:
Intercompany bad debt		(3,978,944)
Total deferred tax liabilities		(3,978,944)
Net deferred tax assets	65,968,134	63,586,299
Less: valuation allowance	(66,225,409)	(63,781,796)
Net deferred tax liabilities	$ (257,275)	$ (195,497)