Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity for Stock Option Plans

A summary of activity for the Company’s stock option plans for the nine months ended September 30, 2020 is as follows:

	Number Outstanding			Average Exercise Price per Share		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
Balance as of December 31, 2019		562,102		$	5.60		5.86	$	572,869
Granted		—			—
Cancelled or Expired		(8,833	)		8.17
Exercised		—			—
Balance as of September 30, 2020		553,269		$	5.56		5.14	$	851,594
Vested or expected to vest as of     September 30, 2020		553,269		$	5.56		5.14	$	851,594
Exercisable as of September 30, 2020		553,269		$	5.56		5.14	$	851,594

Summary Information about Options Outstanding

The following table summarizes information about options outstanding as of September 30, 2020:

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number Outstanding		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Number Exercisable		Weighted Average Exercise Price
$4.36 - $7.20		462,110		5.56	$	4.44		462,110	$	4.44
$7.50 - $11.25		70,698		3.42		9.95		70,698		9.95
$11.30 - $16.95		13,764		1.94		12.90		13,764		12.90
$17.60 - $26.40		6,697		0.99		21.55		6,697		21.55
$4.36 - $26.40		553,269		5.14	$	5.56		553,269	$	5.56

Summary of RSU Activity

The following is a summary of RSU activity for the nine months ended September 30, 2020:

	Number of RSUs			Weighted Average Fair Value
Unvested as of December 31, 2019		1,148,110		$	4.43
Granted		482,683			4.12
Vested		(551,565	)		4.10
Forfeited		(173,224	)		4.69
Unvested as of September 30, 2020		906,004		$	4.41
Shares vested but not released		250,771		$	5.02

Stock-Based Compensation Expense Related to Stock Options and RSUs

The following table illustrates all employee stock-based compensation expense related to stock options and RSUs included in the condensed consolidated statements of operations for the three and nine months ended September 30, 2020 and 2019 (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Cost of revenue	$	43	$	34	$	124	$	97
Research and development		159		107		506		334
Selling and marketing		127		193		371		578
General and administrative		462		355		1,181		1,060
Total	$	791	$	689	$	2,182	$	2,069