Stock-Based Awards (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity Including the Option Exchange Program

The following table summarizes option award activity, including the option exchange program, for the six months ended June 30, 2018 (in thousands):

	Number of Shares
Outstanding at December 31, 2017		2,850
Granted or exchanged		2,173
Exercised		(271	)
Forfeited, cancelled, or exchanged		(1,385	)
Outstanding at June 30, 2018		3,367

Summary of Unvested Shares of Common Stock Activity

The following table summarizes activity of unvested shares of our common stock for the six months ended June 30, 2018 (in thousands):

	Number Of Shares
Outstanding at December 31, 2017		48
Vested		(26	)
Outstanding at June 30, 2018		22

Summary of Restricted Stock Units

Restricted Stock Units

The following table summarizes activity for restricted stock units for the six months ended June 30, 2018 (in thousands):

	Number Of Shares
Outstanding at December 31, 2017		12
Granted		10
Vested		(18	)
Outstanding at June 30, 2018		4

Summary of Stock-Based Compensation Expense

Share-Based Compensation Expense

The following table presents the effects of stock-based compensation in our condensed consolidated statements of operations during the periods presented (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Cost of revenue	$	98	$	37	$	181	$	83
Research and development expense		822		415		1,581		898
Sales and marketing expense		931		572		1,688		1,179
General and administrative expense		762		229		1,228		463
Total	$	2,613	$	1,253	$	4,678	$	2,623