Stock Based Compensation (Tables)

12 Months Ended

Jan. 31, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Common and Preferred Stock Incentive Plans

The Company’s common and preferred stock incentive plans are summarized as follows (the table reflects options for preferred stock on an as converted to common stock basis):

Plan	Authorized and Reserved		Outstanding January 31, 2014			Available to Issue
1999 Series G Convertible Preferred Nonqualified Stock Option Plan (1)		384,615		2,820			—
2005 Series G Convertible Preferred Stock Incentive Plan (1)		1,846,153		1,278,627			—
2007 Stock Incentive Plan (1)		1,076,923		810,788			—
2011 Stock Incentive Plan		769,230		287,876	(2)		480,979
		4,076,921		2,380,111			480,979

(1) Effective upon the consummation of its initial public offering on July 3, 2012, the Company ceased issuing awards under any plan other than its 2011 Stock Incentive Plan.

(2) Outstanding awards include 5,224 restricted stock units granted for the first time in September 2013 to certain members of the board of directors, which will fully vest in June 2014.

Fair Value of Stock Option Awards

The fair value of stock option awards was estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:

	Years Ended January 31,
	2014			2013			2012
Expected life (years)		6.25			6.25			6.48
Risk-free interest rate		2.21	%		1.09	%		2.11	%
Expected volatility		50.6	%		51.6	%		56.7	%
Expected dividend yield		0.0	%		0.0	%		0.0	%

Changes in Common and Preferred Stock Options Issued

A summary of the changes in common and preferred stock options issued under all of the existing stock option plans is as follows (the table reflects options for preferred stock on an as converted to common stock basis):

	Year Ended January 31, 2014
	Number of  Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (1)
Outstanding—beginning of period		2,307,280		$	4.58
Granted		184,728			13.36
Exercised		(73,167	)		3.46
Cancelled		(43,954	)		10.49
Outstanding—end of period		2,374,887		$	5.19		4.2	$	21,137
Exercisable—end of period		1,855,542		$	3.30		3.0	$	19,999
Vested or Expected to Vest—end of period		2,317,942		$	5.02		4.1	$	21,009

(1) The aggregate intrinsic value was calculated based on the positive difference between the fair value of the Company’s stock on January 31, 2014 and the exercise price of the underlying options.

Summarizes Information Relating to Stock Options Granted and Exercised

The following table summarizes information relating to stock options granted and exercised:

	Years Ended January 31
	2014		2013		2012
Weighted average fair value of options granted	$	6.80	$	5.39	$	6.37
Aggregate intrinsic value of options exercised (1)		528		287		285

(1) The aggregate intrinsic value was calculated based on the positive difference between the fair value of the Company’s stock at exercise and the exercise price of the underlying options.

Stock-Based Compensation Expense

Total stock-based compensation expense was recorded within the consolidated statement of operations for the fiscal years ended January 31, 2014, 2013 and 2012 as follows:

	Years Ended January 31
	2014		2013		2012
Cost of revenues	$	137	$	111	$	79
Sales and marketing		239		190		119
Research and development		376		308		227
General and administrative		458		315		211
Total	$	1,210	$	924	$	636