Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Net operating loss carryforwards	$ 28,795,562	$ 20,977,060
Research and development credits	1,435,314	796,328
Deferred revenue	17,396	15,166
Inventory reserve	104,182	19,953
Fixed assets and intangibles	50,128	53,822
Change in fair value of warrant liability	111,993	3,541
Capitalized research and development	27,583	55,354
Other	115,792	85,290
Total deferred tax assets	33,940,706	25,197,117
Valuation allowance	(33,940,706)	(25,197,117)
NuvoGen
Deferred tax assets:
Accrued NuvoGen liability	$ 3,282,756	$ 3,190,603