Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity Under Stock Incentive Plans

A summary of activity under the stock incentive plans is as follows (in thousands, except share data and price per share):

	Shares Subject to Outstanding Options			Weighted- Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding — Balance at December 31, 2016		4,578,782		$	4.38	$	—
Options granted		—		N/A
Options exercised		—		N/A
Options cancelled and forfeited		(198,483	)		3.36
Outstanding — Balance at March 31, 2017		4,380,299		$	4.42	$	—
Vested and expected to vest — March 31, 2017		4,346,958		$	4.41	$	—
Exercisable —March 31, 2017		2,713,195		$	3.65	$	—