Stock-Based Incentive Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Activity Under Stock Option Plan

The table below summarizes the stock option activity for the nine months ended September 30, 2020:

	Number of Shares	Weighted- Average Exercise Price
Outstanding as of December 31, 2019	2,718,971	$8.02
Granted	26,236	17.31
Exercised	(227,334)	4.34
Canceled and forfeited	(13,524)	17.21
Outstanding as of September 30, 2020	2,504,349	8.40

Schedule of Valuation Assumptions Related to Stock Option Awards

The table below summarizes the weighted average grant date fair value per share and the assumptions used to estimate the grant date fair value using the Black-Scholes option-pricing model of the stock options granted during the periods presented:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020	2019			2020			2019
Weighted average grant date fair value per share	—	$5.43			$8.37			$9.78
Expected term (years)	—	5.0	to	7.0	5.5	to	7.0	5.0	to	7.0
Expected volatility	—	46.6%	to	47.3%	46.7%	to	47.2%	41.7%	to	47.3%
Risk-free interest rate	—	1.32%	to	1.39%	1.56%	to	1.64%	1.32%	to	2.59%
Dividend yield	—	—%			—%			—%

Schedule of Restricted Stock Unit Activity

The table below summarizes restricted stock units activity for the nine months ended September 30, 2020:

	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding as of December 31, 2019	543,041	$19.72
Granted	979,082	20.08
Vested	(237,702)	20.67
Canceled and forfeited	(34,248)	19.55
Outstanding as of September 30, 2020	1,250,173	19.83

Schedule of Stock-Based Compensation

The table below presents the detail of stock-based compensation expense amounts included in the condensed consolidated statements of operations:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
	(in thousands)
Cost of goods sold	$	87	$	57	$	243	$	163
Sales and marketing	1,488		807		3,976		2,481
Research and development	299		144		827		364
General and administrative	1,306		903		3,711		2,588
	$	3,180	$	1,911	$	8,757	$	5,596