Restricted Stock Units (Tables) - Restricted Stock Units (RSUs)

3 Months Ended

Mar. 31, 2018

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

Summary of Restricted Stock Units Activity

A summary of unvested restricted stock units (“RSUs”) outstanding as of, and changes made during, the three months ended March 31, 2018, is presented below (shares in thousands):

	RSUs		Weighted Average Grant Price
Unvested restricted stock units outstanding, December 31, 2017	1,752		$	0.57
Vested	(306	)	0.51
Forfeited	(456	)	0.28
Unvested restricted stock units outstanding, March 31, 2018	990		$	0.72

Summary of Compensation Expense

Stock-based compensation expense related to RSUs is allocated as follows (in thousands):

	Three Months Ended
	March 31,
	2018		2017
Cost of revenue	$	5	$	12
Research and development	10		14
Sales and marketing	2		4
General and administrative	23		100
	$	40	$	130