Stock-Based Compensation Arrangements (Stock Option and Restricted Stock Grants) (Detail) - $ / shares	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Shares
Outstanding, beginning of period	4,523,900	5,884,050
Stock options granted	17,779,027	137,000
Stock options exercised	0	0
Restricted stock exercised	0	0
Canceled/Expired	(14,060)	(31,250)
Outstanding, end of period	22,288,867	5,989,800
Exercisable, end of period	2,609,643	711,175
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	2.43
Outstanding, end of period	0.28	0.42
Exercisable, end of period	$ 0.36	$ 0.72