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Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2021

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Fair Value of Stock Option Grants Valuation Assumptions by Block-Scholes Option Pricing Model

The fair value of stock option grants is set forth below and was determined using the Black-Scholes option pricing model with the following assumptions:

		Year Ended December 31,
		2021		2020		2019
Fair value of common stock		$31.12-$48.05		$23.49-$34.07		$20.07-$44.95
Expected term (in years)		6		6		6
Risk-free interest rate		0.45%-1.62%		0.36%-0.83%		1.71%-2.49%
Expected volatility		65%-67%		64%-68%		64%-67%
Expected dividend yield		—		—		—

Schedule of Stock Option Activity

A summary of stock option activities during 2021, 2020 and 2019 is as follows:

		Number of Options Outstanding				Weighted Average Exercise Price				Weighted Average Grant Date Fair Value per Option				Aggregate Intrinsic Value Exercised (in thousands)
Outstanding at December 31, 2018			820,186			$	8.44
Granted			138,200			$	35.76			$	21.86
Exercised			(307,365	)		$	1.47							$	12,117
Canceled			(33,528	)		$	24.80
Outstanding at December 31, 2019			617,493			$	17.13
Granted			347,095			$	32.14			$	19.15
Exercised			(96,456	)		$	3.25							$	2,257
Canceled			(54,890	)		$	26.07
Outstanding at December 31, 2020			813,242			$	24.58
Granted			111,489			$	39.00			$	23.32
Exercised			(97,702	)		$	9.20							$	3,064
Canceled			(43,101	)		$	35.84
Outstanding at December 31, 2021			783,928			$	28.00

Schedule of Additional Information for Stock Options

Additional information for stock options at December 31, 2021 were as follows:

	Number of Options				Weighted Average Exercise Price				Aggregate Intrinsic Value (in thousands)				Weighted Average Remaining Contractual term (in years)
Outstanding at December 31, 2021		783,928				28.00			$	4,524				7.30
Exercisable at December 31, 2021		453,000				23.17			$	4,362				6.37

Schedule of Unvested Restricted Stock Units Awards Activity

The following table summarizes the activity of RSU awards:

		Number of RSUs				Weighted Average Grant Date Fair Value per RSU				Aggregate Fair Value of RSUs Vested (in thousands)
Unvested RSUs at December 31, 2018			110,764			$	19.58
Granted			62,382			$	44.05
Vested			(58,150	)		$	24.75			$	2,610
Unvested RSUs at December 31, 2019			114,996			$	30.24
Granted			91,759			$	31.75
Vested			(54,970	)		$	32.12			$	1,766
Forfeited			(10,277	)		$	41.50
Unvested RSUs at December 31, 2020			141,508			$	29.67
Granted			84,035			$	37.86
Vested			(80,972	)		$	29.22			$	3,078
Forfeited			(15,761	)		$	31.38
Unvested RSUs at December 31, 2021			128,810			$	35.09

Schedule of Stock-Based Compensation Expense Recorded in Consolidated Statements of Operations

Total stock-based compensation expense is recorded in the consolidated statements of operations and was allocated as follows (in thousands):

	Year Ended December 31,
	2021				2020				2019
Cost of revenues	$	1,567			$	1,093			$	670
Sales and marketing		1,612				1,268				955
Research and development		734				580				365
General and administrative		1,959				1,521				1,067
Total	$	5,872			$	4,462			$	3,057

2017 Equity Incentive Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Activity of Shares Available for Grant

The following table summarizes the activity of shares available for grant under the 2017 Equity Incentive Plan:

Shares available for grant at December 31, 2020			1,814,379
Increase in accordance with the evergreen provision			—
Options issued during the year			(111,489		)
Canceled during the year			43,101
RSUs granted			(84,035		)
Shares available for grant at December 31, 2021			1,661,956

2017 Employee Stock Purchase Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Activity of Shares Available for Grant

The following table summarizes the activity of shares available under the 2017 ESPP:

Shares available for grant at December 31, 2020			429,521
Increase in accordance with the evergreen provision			—
Issued during the year			(30,193	)
Shares available for grant at December 31, 2021			399,328

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