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

6 Months Ended

Jun. 30, 2019

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

Summary of Unvested Restricted Stock Units Activity

A summary of unvested restricted stock units (“RSUs”) outstanding as of, and changes made during, the six months ended June 30, 2019, is presented below:

	RSUs		Weighted Average Grant Price
Unvested restricted stock units outstanding, December 31, 2018	503,518		$	1.94
Granted	52,979		1.31
Vested	(112,005	)	3.10
Forfeited	(267	)	1.31
Unvested restricted stock units outstanding, June 30, 2019	444,225		$	1.57

Summary of Stock-based Compensation Expense

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Cost of revenue	$	4	$	12	$	8	$	17
Research and development	5		18		9		28
Sales and marketing	—		2		—		4
General and administrative	14		75		33		98
	$	23	$	107	$	50	$	147