Annual report pursuant to section 13 and 15(d)

Preferred Stock - Additional Information (Detail)

Preferred Stock - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended				12 Months Ended				12 Months Ended					12 Months Ended
	Oct. 31, 2012	Dec. 31, 2012	Sep. 25, 2012	Sep. 12, 2012	Dec. 31, 2011	Dec. 31, 2012 Series B	Dec. 31, 2012 Series C Convertible Preferred Stock D	Dec. 20, 2012 Series C Convertible Preferred Stock	Dec. 31, 2011 Series C Convertible Preferred Stock	Dec. 31, 2012 Series C Convertible Preferred Stock Period 3	Dec. 31, 2012 Series C Convertible Preferred Stock Period 4	Dec. 31, 2012 Series D Convertible Preferred Stock	Dec. 20, 2012 Series D Convertible Preferred Stock	Dec. 31, 2011 Series D Convertible Preferred Stock	Dec. 31, 2012 Series B Preferred Stock	Dec. 31, 2011 Series A Preferred Stock
Preferred Stock [Line Items]
Preferred stock authorized to issue					5,000,000		25,000		25,000			13,000		13,000		3,000
Proceeds from issuance of convertible preferred stock		$ 15,131,551				$ 6,000,000	$ 10,000,000								$ 5,195,225
Preferred stock issued due to investment agreement				600,000			10,000		0			11,177		0
Preferred stock , Par value				$ 0.001			$ 0.001	$ 0.001	$ 0.001			$ 0.001	$ 0.001	$ 0.001
Conversion price per share		$ 0.13					$ 0.6889					$ 0.6959
Convertible Preferred Stock, Total Shares Issued Upon Conversion				46,153,846
Ownership Percentage		73.00%
Convertible stock, Conversion of preferred stock	599,998
Convertible stock, Conversion of convertible securities	46,153,692
Liquidation preference per share				$ 10				$ 1,000					$ 100
Common stock price in increased rate			$ 0.59
Preferred stock issued due to investment agreement								10,000					11,177
Preferred stock conversion as a percentage its stated value in an event of a change in control or a merger or recapitalization										150.00%	125.00%
Preferred stock conversion, trading price as percentage of conversion price							200.00%
Preferred stock conversion, number of trading days							20 days
Preferred stock conversion, number of immediate preceding consecutive trading days							30
Preferred stock, cumulative dividends rate							10.00%
Preferred stock, stated value for cumulative dividends							$ 1,000
Preferred stock, dividends accrued							$ 30,556
Merger agreement, number of shares issuable												738