Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013 sqft	Dec. 31, 2012	Dec. 31, 2011
Commitments And Contingencies Disclosure [Abstract]
Lease expiration date	Jun. 30, 2014
Monthly base rent payment starting date	Jul. 01, 2013
Monthly base rent payment ending date	Jun. 30, 2014
Adjusted base monthly rent under facility lease	$ 16,616
Area of facility lease	5,275
Rent expense	212,473	516,257	582,676
Unapplied purchase commitment due	2,077,000
Unapplied purchase commitment estimated and accrued	162,000
Purchase commitment due	1,345,000
Unapplied purchase commitment due in next twelve months	1,260,000
Unapplied purchase commitment non cancelable contracts	$ 570,000