Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	200,351,909	120,804,705
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	35,468,800	19,491,667
Convertible Debentures
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	67,809,459	27,796,733
Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,085,000	3,585,000
Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	93,988,650	69,931,305