Capital Stock (Tables)

9 Months Ended

Sep. 30, 2014

Capital Stock [Abstract]

Authorized, Issued and Reserved shares of common stock

In addition, the company has the following shares of common stock reserved for issuance as of September 30, 2014:

	Reserved for issuance	Strike Price		Expiry
Shares reserved under outstanding stock options and options available for grant	10,765,500
Rights associated with Employee Stock Purchase Plan	539,302
Common stock additional purchase rights associated with May 2013 private placement	18,214,936
Warrants with common stock additional purchase rights associated with May 2013 private placement	13,661,202	$	0.2745
Outstanding warrants issued in October 2010	1,750,000	$	1.3000	March 5, 2015
Outstanding warrants issued in June 2012	437,158	$	0.2745	June 29, 2017
Outstanding warrants issued in May 2013	20,655,737	$	0.2745	May 17, 2020
Outstanding warrants issued in August 2013	14,426,230	$	0.2745	August 9, 2020
	80,450,065

Black-Scholes Pricing Model Assumptions to Determine Fair Value of Warrants

For purposes of determining the fair value of the warrants exercisable upon shareholder approval of an increase in the Company’s authorized shares, the Black-Scholes pricing model was used with the following assumptions:

	May 17, 2013		June 30, 2013		August 9, 2013
Risk-free interest rate	1.35	%	1.58	%	2.53	%
Expected life	4 years		4 years		4 years
Expected volatility	144.63	%	145.62	%	146.19	%
Dividend Yield	0	%	0	%	0	%