Warrants (Summary of Warrants Activity) (Details) - Warrant [Member] - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Warrant activity, number of shares:
Outstanding, at the beginning of year	1,068,280	2,271,483
Granted	264,585	158,751
Exercised
Expired	(232,950)	(1,361,954)
Outstanding, at the end of year	1,099,915	1,068,280
Warrant activity, weighted average exercise price:
Outstanding, at the beginning of year	$ 0.37	$ 0.46
Granted	$ 0.25	$ 0.25
Exercised
Expired	$ 0.50	$ 0.50
Outstanding, at the end of year	$ 0.32	$ 0.37