Short-term notes payable (Tables)

12 Months Ended

Dec. 31, 2014

Short-term notes payable [Abstract]

Summary of demand notes and warrants

Date	Phoenix Banner Holdings LLC		Michael W. Engmann		Kendu Partners Company		JAG Multi Investments		Philip Sassower
	Note Amount	Warrants	Note Amount	Warrants	Note Amount	Warrants	Note Amount	Warrants	Note Amount	Warrants
8/2/2013	$ 250
9/3/2013					$ 250
9/27/2013			$ 250
11/1/2013							$ 125	2,083
11/6/2013		4,167		4,167		4,167
12/13/2013			$ 150	5,000
12/17/2013									$ 125	2,083
Total	$ 250	4,167	$ 400	9,167	$ 250	4,167	$ 125	2,083	$ 125	2,083

Key assumptions used to calculate fair value of warrants

The warrants were valued using the Black Sholes Merton pricing model with the following assumptions:

Date	Expected Term	Volatility	Risk free interest rate	Dividend yield
11/6/2013	Three years	202.9%	0.58%	$0.00
11/26/2013	Three years	200.8%	0.55%	$0.00
12/3/2013	Three years	198.8%	0.68%	$0.00
12/17/2013	Three years	198.0%	0.68%	$0.00