Stockholders' equity (Tables)

12 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Stock Option Activity

A summary of our stock option activity is as follows (in thousands except per share and contractual life amounts):

	Number of shares		Weighted average exercise price per share		Weighted average remaining contractual  life (years)	Aggregate intrinsic value
Options outstanding as of June 30, 2018	5,116		$	6.48
Granted	290		5.10
Exercised	(1,477	)	5.99
Canceled or expired	(520	)	6.95
Options outstanding as of June 30, 2019	3,409		$	6.49	5.53	$	5,748
As of June 30, 2019:
Options vested and expected to vest	3,341		$	6.52	5.47	$	5,564
Options exercisable	2,703		$	6.74	4.95	$	4,000

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of our RSU activity is as follows (in thousands except contractual life amounts):

	Number of Shares		Weighted average remaining contractual  life (years)	Aggregate intrinsic value
RSUs outstanding as of June 30, 2018	3,068
Granted	1,195
Vested	(1,151	)
Canceled	(475	)
RSUs outstanding as of June 30, 2019	2,637		1.30	$	21,097
As of June 30, 2019:
RSUs expected to vest	2,276		1.18	$	18,205

A Summary of Shares Available for Grant Activity

A summary of our shares available for grant activity is as follows (in thousands):

	Number of Shares
Shares available for grant as of June 30, 2018	3,169
Additional shares authorized pursuant to annual increase provisions of 2009 Equity Incentive Plan	1,667
Granted	(1,485	)
RSUs withheld for taxes in net share settlements	367
Canceled	994
Shares available for grant as of June 30, 2019	4,712

Stock-Based Compensation Expense

The following table summarizes total stock-based compensation expense included in our consolidated statements of operations (in thousands):

	Fiscal Year Ended June 30,
	2019		2018		2017
Cost of revenue	$	108	$	145	$	130
Research and development	4,830		5,535		5,543
Sales and marketing	1,348		1,671		2,090
General and administrative	2,013		2,525		2,399
Total stock-based compensation expense	$	8,299	$	9,876	$	10,162

Schedule of Stock-based Compensation Expenses

The following table summarizes total stock-based compensation expense recorded for stock options, RSUs and restricted common stock issued to employees and nonemployees (in thousands):

	Fiscal Year Ended June 30,
	2019		2018		2017
Stock option awards	$	1,644	$	2,103	$	2,384
RSU awards	6,655		7,773		7,778
Total stock-based compensation expense	$	8,299	$	9,876	$	10,162

Assumptions Used to Estimate Weighted Average Fair Value of Options

The weighted average assumptions used to value stock options granted and the resulting weighted average grant date fair value per share were as follows:

	Fiscal Year Ended June 30,
	2019			2018			2017
Expected volatility	39		%	42		%	39		%
Expected term (in years)	6.87			4.75			4.25
Risk-free interest rate	2.99		%	2.00		%	1.32		%
Dividend yield	—			—			—
Weighted average grant date fair value per share	$	2.32		$	2.14		$	1.87

Schedule of Shares Reserved For Future Issuance

Common stock reserved for future issuance as of June 30, 2019 was as follows (in thousands):

Stock options outstanding	3,409
RSUs outstanding	2,637
Available for future grants	4,712
Total common shares reserved for future issuance	10,758