Income Taxes (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
NOL carryforward	$ 38,797,762	$ 28,704,237
R&E credit carryforward	1,994,478	1,894,478
Share-based compensation	383,153	144,742
Inventory reserve	226,299	334,578
Depreciation	313,714	246,233
Accruals and other	495,640	185,702
Total deferred tax assets	42,211,046	31,509,970
Valuation allowance	(41,554,045)	(31,505,287)
Deferred tax liabilities:
Intangible assets	(657,001)	0
Fixed assets	0	(4,683)
Net deferred tax liability	$ 0	$ 0