STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Jan. 31, 2017

STOCK-BASED COMPENSATION

Summary of stock based compensation expense

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

	Year ended
	January 31,
	2017		2016
Research and development	$	398	$	256
Sales and marketing		346		443
General and administrative		747		515
Total	$	1,491	$	1,214

Black-Scholes option pricing model fair value assumptions

	Year ended
	January 31,
	2017	2016
Expected volatility	95.5% - 98.6%	81.3% - 82.6%
Expected term in years	5.0 - 6.5	6.0
Risk-free interest rate	1.12% - 2.03%	1.57% - 2.26%
Expected dividend yield	—	—