STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Jan. 31, 2019

STOCK-BASED COMPENSATION

Summary of stock based compensation expense

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

	Year ended
	January 31,
	2019		2018
Research and development	$	654	$	545
Sales and marketing		414		393
General and administrative		993		949
Total	$	2,061	$	1,887

Black-Scholes option pricing model fair value assumptions

	Year ended
	January 31,
	2019	2018
Expected volatility	78.8% - 91.0%	83.9% - 96.8%
Expected term in years	4.0	6.0 - 9.39
Risk-free interest rate	2.43% - 2.98%	1.80% - 2.70%
Expected dividend yield	—	—