Income Taxes (Details 1) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets:
Net operating loss ("NOLs") carryforwards	$ 65,635,003	$ 64,361,842	$ 61,590,084
Fixed assets/intangibles	139,853	166,205	148,395
Research and development credits/loss carryforwards	8,900	3,834	1,726
Share-based compensation	2,352,660	3,458,334	3,368,571
Accrued expenses and other	91,210	366,797	859,358
Total deferred tax assets	68,227,626	68,357,012	65,968,134
Deferred tax liabilities:
Intercompany bad debt	0	0	0
Total deferred tax liabilities	0	0	0
Net deferred tax assets	68,227,626	68,357,012	65,968,134
Less: Valuation allowance	(68,608,401)	(68,676,033)	(66,225,409)
Net deferred tax liabilities	$ (380,775)	$ (319,021)	$ (257,275)