Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Options Granted under Company's Stock Incentive Plans, Valuation Assumptions and Fair Values

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2020	2019	2020	2019
Average risk-free interest rate	0.26%	1.97%	0.79%	2.23%
Expected dividend yield	None	None	None	None
Expected life	3.5 years	3.5 years	3.5 years	3.5 years
Expected volatility	64.0% to 65.7%	51.9% to 54.2%	50.2 to 65.7%	51.9% to 54.2%
Weighted average exercise price	$10.76	$5.81	$10.11	$4.78
Weighted average fair value	$4.96	$2.35	$4.34	$1.93

Stock-Based Compensation Expense Including Options and Restricted Stock by Category

The Company’s stock-based compensation expense, including options and restricted stock by category is as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Cost of revenue	$	24	$	1	$	24	$	2
Engineering and product development		288		32		343		119
Marketing and sales		490		57		548		116
General and administrative		811		214		1,162		279
	$	1,613	$	304	$	2,077	$	516

Unrecognized Compensation Cost Related to Unexercisable Options and Unvested Restricted Stock and Weighted Average Remaining Period

As of June 30, 2020, unrecognized compensation cost (in thousands) related to unvested options and unvested restricted stock and the weighted average term of such equity instruments is as follows:

Remaining expense	$	1,442
Weighted average term		1.0

Aggregate Intrinsic Value

The Company’s aggregate intrinsic value for stock options and restricted stock outstanding is as follows (in thousands):

	As of
	June 30,
Aggregate intrinsic value	2020		2019
Stock options	$	8,992	$	2,273
Restricted stock		709		1,674