The Company has a stock-based compensation plan pursuant to which it has granted stock options and RSUs. The Company also maintains its 2015 Employee Stock Purchase Plan (the “ESPP”) for all eligible employees.

Stock Options. Stock option activity for the nine months ended October 31, 2019 was as follows:

				Weighted Average		Aggregate
	Shares			Exercise Price		Intrinsic Value
	(in thousands)			Per Share		(in thousands)
Balance as of January 31, 2019		1,691		$	6.39	$	14,755
Granted		89		$	15.49
Exercised		(210	)	$	2.12
Canceled		(80	)	$	8.22
Balance as of October 31, 2019		1,490		$	7.44	$	6,595
Vested and exercisable as of October 31, 2019		1,314		$	6.68	$	6,547

The aggregate intrinsic value of vested options exercised during the nine months ended October 31, 2019 and 2018 was $1.9 million and $1.2 million, respectively. The weighted average grant date fair value of options granted during the nine months ended October 31, 2019 and 2018 was $7.13 and $5.28 per share, respectively.

Restricted Stock Units. RSU activity for the nine months ended October 31, 2019 was as follows:

	Shares (in thousands)			Weighted Average Grant-Date Fair Value Per Share
Balance as of January 31, 2019		1,925		$	10.49
Granted		1,006		$	14.94
Vested		(799	)	$	10.55
Canceled		(164	)	$	12.12
Balance as of October 31, 2019		1,968		$	12.61

Employee Stock Purchase Plan. The ESPP allows eligible employees to purchase shares of common stock at a discount through payroll deductions of up to 15% of their eligible compensation (subject to plan limitations). The ESPP provides for a 24-month offering period comprised of four purchase periods of approximately six months. Employees are able to purchase shares at 85% of the lower of the fair market value of the Company’s common stock as of the first date or the ending date of each six-month offering period. The offering periods are scheduled to start on the first trading day on or after March 15 and September 15 of each year.

During the nine months ended October 31, 2019 and 2018, employees purchased approximately 0.2 million and 0.3 million shares, respectively, at a weighted purchase price of $9.97 and $6.82 per share, respectively.