STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jul. 31, 2017

STOCK-BASED COMPENSATION

Summary of stock based compensation expense

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

	For the three months ended				For the six months ended
	July 31,				July 31,
	2017		2016		2017		2016
Research and development	$	158	$	129	$	266	$	205
Sales and marketing		109		98		191		182
General and administrative		299		197		494		310
Total	$	566	$	424	$	951	$	697

Black-Scholes option pricing model fair value assumptions

	For the three months ended		For the six months ended
	July 31,		July 31,
	2017	2016	2017	2016
Expected volatility	96.7%	97.0% - 98.6%	95.5% - 96.8%	97.0% - 98.6%
Expected term in years	9.9	6.5	6.0 - 9.9	6.5
Risk-free interest rate	2.29%	1.14% - 1.28%	1.80% - 2.29%	1.14% - 1.28%
Expected dividend yield	—	—	—	—