Stockholders' equity (Tables)

12 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

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, 2019	4,472
Annual share increase authorized under 2009 Plan	1,667
Granted	(1,681	)
RSUs withheld for taxes in net share settlements	251
Canceled	633
Expired under 2009 and 2011 Plans	(5,342	)
Shares available under 2009 and 2011 Plans upon termination on November 20, 2019	—
Initial shares authorized under 2019 Plan on November 20, 2019	5,700
Shares added from 5,800,000 reserved share pool available(1)	613
Granted	(1,068	)
RSUs withheld for taxes in net share settlements	35
Shares available for grant as of June 30, 2020	5,280
(1) Additional shares are available up to a maximum of 5,800,000 shares only to the extent shares subject to grants under the 2009 Plan were outstanding as of November 20, 2019 but later expire or otherwise terminate without having been exercised in full.

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, 2019	3,409		$	6.49
Granted	55		4.92
Exercised	(1,351	)	6.27
Canceled or expired	(475	)	6.78
Options outstanding as of June 30, 2020	1,638		$	6.55	5.17	$	209
As of June 30, 2020:
Options vested and expected to vest	1,620		$	6.56	5.14	$	201
Options exercisable	1,432		$	6.74	4.79	$	128

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, 2019	2,637
Granted	1,633
Vested	(1,057	)
Canceled	(737	)
RSUs outstanding as of June 30, 2020	2,476		1.39	$	13,595
As of June 30, 2020:
RSUs expected to vest	2,175		1.29	$	11,938

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,
	2020		2019		2018
Cost of revenue	$	60	$	77	$	108
Research and development	4,766		4,633		5,263
Sales and marketing	971		681		872
General and administrative	2,237		2,013		2,525
Total stock-based compensation expense	$	8,034	$	7,404	$	8,768

Schedule of Stock-based Compensation Expenses

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

	Fiscal Year Ended June 30,
	2020		2019		2018
Stock option awards	$	805	$	1,578	$	2,053
RSU awards	6,710		5,826		6,717
ESPP	519		—		—
Total stock-based compensation expense	$	8,034	$	7,404	$	8,768

Assumptions Used to Estimate Weighted Average Fair Value of Options

The weighted average assumptions used to value ESPP purchase rights during the initial offering period beginning March 1, 2020 were as follows:

Expected volatility	93	%
Expected term (in years)	0.75
Risk-free interest rate	0.92	%
Dividend yield	—

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,
	2020			2019			2018
Expected volatility	48		%	39		%	42		%
Expected term (in years)	5.65			6.87			4.75
Risk-free interest rate	1.58		%	2.99		%	2.00		%
Dividend yield	—			—			—
Weighted average grant date fair value per share	$	2.27		$	2.32		$	2.14

Schedule of Shares Reserved For Future Issuance

Common stock reserved for future issuance as of June 30, 2020 was as follows (in thousands):

Stock options outstanding	1,638
RSUs outstanding	2,476
Available for future grants	5,280
Total common shares reserved for future issuance	9,394