Stock Options - Summary of Stock Options Activity (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of options, Outstanding beginning balance	2,100,000	1,800,000
Number of options, Granted	150,000	350,000
Number of options, Expired		(50,000)
Number of options, Outstanding ending balance	2,250,000	2,100,000
Weighted average exercise price, Outstanding beginning balance	$ 0.17	$ 0.15
Weighted average exercise price, Granted	0.14	0.14
Weighted average exercise price, Expired	0	0
Weighted average exercise price, Outstanding ending balance	0.17	0.17
Weighted average fair value, Outstanding beginning balance	0.14	0.13
Weighted average fair value, Granted	0.14	0.20
Weighted average fair value, Outstanding ending balance	$ 0.14	$ 0.14
Aggregate intrinsic value, Outstanding	$ 0	$ 0	$ 0