Restricted Stock Units (Tables) - Restricted Stock Units

6 Months Ended

Jun. 30, 2016

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Restricted Stock Units Activity

A summary of restricted stock units granted, vested, forfeited and unvested outstanding as of, and changes made during, the six months ended June 30, 2016, is presented below (shares in thousands):

	Restricted Stock Units		Weighted Average Grant Price
Unvested restricted stock units outstanding, December 31, 2015	2,164		$	1.02
Granted	1,677		0.49
Vested	(387	)	0.92
Forfeited	(246	)	0.91
Unvested restricted stock units outstanding, June 30, 2016	3,208		$	0.76

Summary of Compensation Expense

Stock-based compensation expense related to restricted stock units is allocated as follows for the three and six months ended June 30, 2016 and 2015 (in thousands):

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2016			2015		2016		2015
Cost of revenue	$	9		$	3	$	17	$	5
Research and development	10			3		19		5
Sales and marketing	(3		)	2		1		3
General and administrative	84			80		161		145
	$	100		$	88	$	198	$	158