Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) (USD $)			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 United States of America [Member]
Summary Of Significant Accounting Policies [Line Items]
Short term investments, fair value	$ 9,009,756	$ 24,021,522
Short term investments, carrying value	9,003,215	24,014,305
Long-term investments, fair value		6,007,851
Long-term investments, carrying value		6,008,169
Capitalized legal patent cost	1,800,000	100,000
Product revenue			4,491,288
Deferred revenue balance			$ 1,002,445
Cash discount to incentive for prompt payment			2.00%