Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended				12 Months Ended
	Oct. 31, 2012	Aug. 31, 2012	Jul. 31, 2011	Feb. 28, 2009	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies [Line Items]
Operating lease agreements, period					1 year
Base rent			$ 235,000
Operating lease agreements, rent					15,000
Lease expiration date			Sep. 30, 2012
Lease extension period			1 year
Bank deposit						59,000
Operating lease		44,000			216,000	293,000
Operating lease period		1 year
Severance payment due to Dr. Platt				1,000,000	42,000	385,000
Number of options vested				83,334	595,420	380,391
Royalty revenue				50,000,000
Cashless stock option exercisable					2,067,910
Market capitalization				100,000,000
Severance payment period				6 months
Separation based payments	1,000,000
Lawsuit payment	1,000,000
Conversion of share, common stock issued					51,830	64,273
Dividend rights issued			5
Rate of dividend			6.00%
Norcross
Commitments and Contingencies [Line Items]
Operating lease agreements, period					26 months
Operating lease agreements, Expiry date					Nov. 30, 2014
Base rent					3,000
Operating lease agreements, Security Deposit					6,000
Series C Super Dividend Convertible Preferred Stock
Commitments and Contingencies [Line Items]
Series C prefer stock converted to common stock			5			220
Conversion of share, common stock issued			8,334			366,676
Rate of dividend						6.00%
Common Stock
Commitments and Contingencies [Line Items]
Conversion of share, common stock issued			8,334
Minimum
Commitments and Contingencies [Line Items]
Equity investment				$ 10,000,000
Cashless stock option exercisable				50,000