Convertible Debt - Additional Information (Detail) (USD $)	9 Months Ended						3 Months Ended		9 Months Ended			9 Months Ended			9 Months Ended					9 Months Ended		1 Months Ended	0 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Jan. 14, 2011	Sep. 30, 2012 Warrant	Sep. 30, 2012 Conversion Options	Sep. 30, 2012 10% convertible debentures	Mar. 31, 2011 10% convertible debentures	Sep. 30, 2012 10% convertible debentures	Sep. 30, 2009 10% convertible debentures	Jan. 14, 2011 10% convertible debentures	Sep. 30, 2012 10% convertible debentures After Amendment	Jan. 31, 2011 10% convertible debentures After Amendment	Jan. 14, 2011 10% convertible debentures After Amendment	Sep. 30, 2012 10% convertible debentures After Amendment Maximum	Jan. 14, 2011 10% convertible debentures After Amendment Cash Transactions	Jan. 14, 2011 10% convertible debentures After Amendment Non Cash	Jan. 14, 2011 10% convertible debentures Before Amendment	Jan. 14, 2011 10% convertible debentures Before Amendment Non Cash	Sep. 30, 2012 8% convertible promissory notes	Jun. 30, 2012 8% convertible promissory notes	Sep. 30, 2012 8% convertible promissory notes Demand Notes	Sep. 28, 2012 8% convertible promissory notes Investor	Sep. 30, 2012 8% convertible promissory notes Investor	Aug. 24, 2012 8% convertible promissory notes Investor	Sep. 30, 2012 8.75% Percent Convertible Debenture	Mar. 31, 2012 8.75% Percent Convertible Debenture
Debt Disclosure [Line Items]
Convertible debt, interest rate	8.00%									10.00%						15.00%	18.00%		12.00%	8.00%						8.75%
Proceeds from convertible debt	$ 1,500,000	$ 0								$ 600,000													$ 1,500,000
Convertible debt, maturity date												Jun. 30, 2012														Jan. 31, 2012
Convertible debt, conversion price for interest payment														$ 0.60				$ 0.90
Convertible debt, conversion price														$ 2.50				$ 2.00					$ 0.40		$ 0.40
Warrant term													3 years
Number of shares of common stock called by warrants, percentage of outstanding principal				5.00%							5.00%
Warrant exercise price	1.0													0.90						0.60
Percent difference in the present value of cash flows between the original terms and the modified terms															10.00%
Loss on debt extinguishment								1,400,000
Fair value of derivative liability							797,000		797,000			797,000
Change in fair value of derivative									13,300
Principal and accrued interest repaid expense	(772,500)	0					600,000
Convertible debt	6,628,520		772,500																		5,000,001		1,500,000		5,128,520
Warrants to purchase common stock, shares	3,800,000																						3,750,000		12,821,302
Debt Instrument Payment Terms																				The August Notes and the September Notes (in the aggregate, the "Notes"), including all outstanding principal and accrued and unpaid interest, are due and payable on the earlier of five years from date of issuance or upon the occurrence of an Event of Default
Warrant Terms																				for a period commencing on the date of issuance and ending on the earlier to occur of the date that is (i) three years after the date upon which the weighted average price of a share of Common Stock for the 90 consecutive trading days prior to such date is at least $2.00 per share, and (ii) five years after the date on which the Note to which the applicable Warrant is related has been repaid in full.
Debt instrument aggregate principal amount under definitive agreements																								10,000,000
Outstanding principal balance of demand notes																						5,000,000
Debt issued, principal amount																											172,500
Debt Issuance Cost																				121,100
Derivative liability at fair value					$ 427,900	$ 982,900