Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Mar. 31, 2010	Oct. 31, 2004
Income Tax Disclosure [Abstract]
Provision for federal, state and foreign income taxes	$ (1,193,973)	$ (1,628,597)	$ (1,187,368)	$ (2,703,872)
Valuation allowance, reversed					677,000
Uncertain tax provisions	272,000		272,000		251,000
Interest expense		2,000		2,000
Net operating loss subject to limitation						$ 12,800,000	$ 219,000