Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2016

Stockholders' Equity [Abstract]

Summary of Stock Option Activity

The following table represents the stock option activity for the six months ended June 30, 2016:

	Number of Shares			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding options at December 31, 2015		3,669,469		$	2.74		6.66	$	0
Granted		1,867,493		$	0.84
Exercised		—			—
Forfeited		(767,068	)	$	2.46
Outstanding options at June 30, 2016		4,769,894		$	2.04		7.36	$	24
Options vested and expected to vest		4,530,587		$	2.08		7.26	$	22
Exercisable at June 30, 2016		1,940,291		$	3.04		4.75	$	2

Summary of Restricted Stock Units Activity

The following table represents RSU activity for the six months ended June 30, 2016:

	Number of Shares			Weighted Average Grant-Date Fair Value per Share		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding RSUs at December 31, 2015		1,697,897		$	2.25		1.41	$	1,715
Awarded		261,215			0.89
Released		(403,064	)		1.73
Forfeited		(318,504	)		2.00
Outstanding RSUs at June 30, 2016		1,237,544		$	2.20		1.47	$	1,041