Equity Award Plans (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity under the 2006 Plan and 2013 Plan

A summary of stock option activity under the 2006 Plan and 2013 Plan is as follows (in thousands except per share amounts and contractual terms):

	Options Outstanding
	Number of Shares			Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term (in Years)		Aggregate Intrinsic Value
Balances at December 31, 2016		3,749		$	6.26		7.48	$	194
Options forfeited and cancelled		(490	)		5.60		—
Balances at March 31, 2017		3,259		$	6.36		6.35	$	57
Options exercisable		2,173		$	7.67		5.11	$	57
Options vested		2,171		$	7.67		5.11	$	57
Options vested and expected to vest		3,200		$	6.41		6.30	$	57

Summary of RSUs Granted and Unvested under the 2013 Plan

A summary of RSUs granted and unvested under the 2013 Plan is as follows:

	RSUs Outstanding
	Number of Shares			Weighted Average Grant Date Fair Value Per Unit
Granted and unvested at December 31, 2016		3,003		$	3.07
RSUs granted		328			1.81
RSUs vested		(165	)		4.20
RSUs cancelled and withheld to cover taxes		(622	)		3.01
Granted and unvested at March 31, 2017		2,544		$	2.85