Stock-Based Compensation Arrangements (Stock Option and Restricted Stock Grants) (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Shares
Outstanding, beginning of period	4,523,900	5,884,050
Stock options granted	17,793,027	137,000
Stock options exercised	0	0
Restricted stock exercised	0	0
Canceled/Expired	(58,268)	(1,210,375)
Outstanding, end of period	22,258,659	4,810,675
Exercisable, end of period	3,067,959	723,925
Weighted Avg. Exercise Price
Outstanding, beginning of period	$ 0.39	$ 0.43
Stock options granted	0.17	0.35
Stock options exercised	0.00	0.00
Restricted stock exercised	0.00	0.00
Canceled/Expired	0.28	0.43
Outstanding, end of period	0.22	0.43
Exercisable, end of period	$ 0.34	$ 0.71