Stockholders’ Equity and Stock-Based Compensation (Tables)

3 Months Ended

Apr. 30, 2017

Stock-Based Compensation Expense Related to Stock Options Issued and Restricted Stock Units by the Company

Total stock-based compensation expense related to stock options and restricted stock units issued by the Company is as follows: 

	Three Months Ended April 30,
	2017		2016
Cost of revenues	$	37	$	44
Sales and marketing		71		90
Research and development		271		183
General and administrative		246		172
Total	$	625	$	489

Service-Based Stock Options [Member]

Assumptions Used to Calculate Fair Value of Common Stock Options for Employees and Executive Team Members

The fair value of common stock service-based options for employees is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions used:

	Three Months Ended April 30,
	2017		2016
Expected life (years)		6.25		6.25
Risk-free interest rate		2.05%		1.54%
Expected volatility		34.1%		35.3%
Expected dividend yield		0.0%		0.0%