Stock-Based Compensation - Exercise Prices of Common Stock Options Outstanding and Exercisable (Details) - $ / shares	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Exercise Prices	$ 0.697	$ 0.582	$ 0.818
Options Outstanding (Shares)	7,950,000
Options Exercisable (Shares)	6,800,000
Exercise Price Three [Member]
Exercise Prices	$ .500
Options Outstanding (Shares)	4,400,000
Options Exercisable (Shares)	4,300,000
Exercise Price Four [Member]
Exercise Prices	$ .650
Options Outstanding (Shares)	700,000
Options Exercisable (Shares)	700,000
Exercise Price Five [Member]
Exercise Prices	$ .980
Options Outstanding (Shares)	250,000
Options Exercisable (Shares)	250,000
Exercise Price Six [Member]
Exercise Prices	$ 1.000
Options Outstanding (Shares)	1,500,000
Options Exercisable (Shares)	1,000,000
Exercise Price Seven [Member]
Exercise Prices	$ 2.000
Options Outstanding (Shares)	500,000
Options Exercisable (Shares)
Exercise Price One [Member]
Exercise Prices	$ 0.130
Options Outstanding (Shares)	100,000
Options Exercisable (Shares)	50,000
Exercise Price Two [Member]
Exercise Prices	$ 0.250
Options Outstanding (Shares)	500,000
Options Exercisable (Shares)	500,000