Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Share-Based Compensation Expense

The amount of share-based compensation expense recognized by the Company by location in its statements of operations for the three and six months ended June 30, 2019 and 2018 is as follows (in thousands):

	Three Months ended June 30,				Six Months ended June 30,
	2019		2018		2019		2018
Cost of revenues	$	19	$	5	$	29	$	9
Sales and marketing		404		65		608		119
General and administrative		479		87		697		142
Research and development		120		35		189		66
Total	$	1,022	$	192	$	1,523	$	336

Summary of Stock Option Activity

The following table summarizes the Company’s stock option activity for the six months ended June 30, 2019:

	Number of Shares under Option (in thousands)			Weighted- average Exercise Price per Option		Weighted- average Remaining Contractual Life (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2018		2,711		$	3.59
Granted		588		$	16.08
Exercised		(687	)	$	2.82
Forfeited		(105	)	$	8.86
Outstanding at June 30, 2019		2,507		$	6.51		7.6	$	17,741
Exercisable at June 30, 2019		1,204		$	2.39		6.2	$	12,221
Vested and expected to vest at June 30, 2019		2,507		$	6.51		7.6	$	17,741

Summary of Weighted-average Inputs and Assumptions used to Estimate Grant-date Fair Value of Stock Options

For the six months ended June 30, 2019, the grant-date fair value of stock options was estimated at the time of grant using the following weighted-average inputs and assumptions in the Black-Scholes option pricing model:

Estimated fair value of common stock	$	16.08
Exercise price	$	16.08
Expected term (in years)		6.1
Risk-free interest rate		2.4	%
Expected volatility		55.3	%
Dividend yield		0	%

Summary of Restricted Stock Award and Restricted Stock Unit Activity

The following table summarizes the Company’s restricted stock award and restricted stock unit activity for the six months ended June 30, 2019:

	Non-vested Restricted Stock Awards (in thousands)			Weighted- average Grant-date Fair Value		Non-vested Restricted Stock Units (in thousands)			Weighted- average Grant-date Fair Value
Non-vested at December 31, 2018		4		$	2.32		43		$	25.21
Granted		-		$	-		155		$	15.77
Vested		(4	)	$	2.32		(14	)	$	22.23
Non-vested at June 30, 2019		-		$	-		184		$	17.41