Stock-Based Compensation (Tables)

1 Months Ended

3 Months Ended

Jan. 31, 2015

Apr. 30, 2015

Stock-Based Compensation

Summary of stock based compensation expense

        The following table summarizes the stock-based compensation expenses included in our Statement of Operations and Comprehensive Loss the months ended January 31, 2015 and 2014 and the years ended December 31, 2014 and 2013 (in thousands):

	Month ended January 31,				Year ended December 31,
	2015		2014		2014		2013
			(Unaudited)
Research and development	$	27	$	8	$	228	$	30
Sales and marketing		40		1		147		7
General and administrative expenses		32		2		818		21
Stock-based compensation expense, net of tax	$	99	$	11	$	1,193	$	58

The following table summarizes the stock-based compensation expenses included in the unaudited condensed consolidated statement of operations and comprehensive loss (in thousands):

	For the three months ended
	April 30,
	2015		2014
Research and development	$	86	$	34
Sales and marketing	124		16
General and administrative	90		65
Stock-based compensation expense	$	300	$	115

Black-Scholes option pricing model fair value assumptions

				Year ended December 31,
	Month ended January 31, 2015
				2014			2013
Expected volatility		82.1	%		82.2	%	82.1%
Expected term in years		6.0			6.0		5.51 - 6.08
Risk-free interest rate		1.56	%		1.74	%	0.61 - 1.62%
Expected dividend yield		—	%		—	%	—%

	For the three months ended April 30,
	2015	2014
Expected volatility	82.6%	82.1%
Expected term in years	6.0	5.52 - 6.08
Risk-free interest rate	1.62%-1.99%	0.67% - 0.89%
Expected dividend yield	—	—