Stock-Based Compensation Arrangements (Non-vested options) (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Non-vested options, beginning of year	2,878,739	5,295,300
Non-vested options, beginning of year, Weighted Avg Exercise Price	$ 0.37	$ 0.38
Granted, Shares	18,193,027	137,000
Granted, Weighted Avg Exercise Price	$ 0.17	$ 0.35
Vested, Shares	(2,038,435)	(1,360,436)
Vested, Weighted Avg Exercise Price	$ 0.33	$ 0.38
Forfeited, Shares	(1,040,679)	(1,193,125)
Forfeited, Weighted Avg Exercise Price	$ 0.17	$ 0.38
Non-vested options, end of year, Shares	17,992,652	2,878,739
Non-vested options, end of year, Weighted Avg Exercise Price	$ 0.18	$ 0.37