Antidilutive Securities Excluded from Computation of Loss Per Share (Detail)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	234,779,109	120,993,963
Options
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	90,505,370	27,231,569
Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,085,000	3,085,000
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	105,719,939	71,185,727