Options and warrants (Tables)

12 Months Ended

Dec. 31, 2016

Options And Warrants Tables

Fair value of options granted

Expected volatility	92% – 174		%
Expected dividend yield		-
Risk-free interest rate	1.21% - 1.24		%
Expected term (in years)		5.0

Stock option and warrant activity

	Shares		Weighted Average Exercise Prices		Weighted Average Remaining Contractual Life		Aggregate Intrinsic Value
Outstanding and Exercisable
Outstanding at December 31, 2015		4,600,000	$	0.22		4.46		-
Options and warrants granted		1,050,000	$	0.18		-		-
Options and warrants cancelled or expired		40,000	$	6.00		-		-
Outstanding at December 31, 2016		5,610,000	$	0.17		3.62		440,000
Exercisable at December 31, 2016		5,110,000	$	0.17		3.57		400,000