Stockholders' Equity (Deficit) - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified			9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2012 Restricted Stock [Member]	Mar. 31, 2012 Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock [Member] Selling, General and Administrative Expense [Member]	Sep. 30, 2012 Restricted Stock [Member] Executive Director 1 [Member]	Sep. 30, 2012 Restricted Stock [Member] Executive Director 2 [Member]	Mar. 31, 2012 Restricted Stock [Member] Consultant [Member]	Sep. 30, 2012 Restricted Stock [Member] Consultant [Member]	Mar. 31, 2012 Restricted Stock [Member] Consultant [Member] Selling, General and Administrative Expense [Member]	Mar. 31, 2012 Restricted Stock [Member] Consultant [Member] Research and Development Expense [Member]	Sep. 30, 2012 Restricted Stock [Member] Consultant [Member] Research and Development Expense [Member]	Sep. 30, 2012 Restricted Stock [Member] Director and Vice President [Member]	Sep. 30, 2012 Restricted Stock [Member] Director and Vice President [Member] Selling, General and Administrative Expense [Member]	Sep. 30, 2012 Warrants and Stock Options [Member]	Sep. 30, 2011 Warrants and Stock Options [Member]	Sep. 30, 2012 Preferred Stock [Member]	Sep. 30, 2011 Preferred Stock [Member]
Stockholders Equity Note [Line Items]
Anti-dilutive securities not included in the computation of diluted loss per share													922,667	1,205,762	599,075	571,754
Restricted common stocks issued for services, shares				1,200,056	1,713,019	1,066,667	849,838
Restricted common stocks issued for services, value			$ 53,500					$ 10,000	$ 12,000	$ 15,000
Restricted common stocks issued for services, per share			$ 0.02					$ 0.02	$ 0.02
Number of directors compensated	2
Number of consultants		2
Restricted common stocks issued for employee compensation, shares											1,626,481
Restricted common stocks issued for employee compensation, value												$ 30,000
Restricted common stocks issued for employee compensation, per share												$ 0.02