Restricted Stock Units (Tables) - Vested deferred restricted stock units

6 Months Ended

Jun. 30, 2017

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

Summary of Restricted Stock Units Activity

A summary of restricted stock units (“RSUs”) granted, vested, forfeited and unvested outstanding as of, and changes made during, the six months ended June 30, 2017, is presented below (shares in thousands):

	RSUs		Weighted Average Grant Price
Unvested RSUs outstanding, December 31, 2016	3,196		$	0.62
Granted	—		—
Vested	(724	)	0.41
Forfeited	(85	)	0.61
Unvested RSUs outstanding, June 30, 2017	2,387		$	0.68

Summary of Compensation Expense

Stock-based compensation expense related to RSUs is allocated as follows for the three and six months ended June 30, 2017 and 2016 (in thousands):

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2017		2016			2017		2016
Cost of revenue	$	8	$	9		$	19	$	17
Research and development	14		10			29		19
Sales and marketing	—		(3		)	4		1
General and administrative	80		84			180		161
	$	102	$	100		$	232	$	198