Stock-Based Compensation - Schedule of Stock Based Compensation Expense Allocation (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense allocation	$ 167,073	$ 168,546	$ 273,040	$ 487,981
Cost of Revenues [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense allocation	4,868	2,951	4,868	10,039
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense allocation		10,765		61,250
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense allocation	$ 162,205	$ 154,830	$ 268,172	$ 416,692