Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Schedule of restricted stock activity

Restricted share activity during the three months ended March 31, 2019 was as follows:

	Number of Restricted Shares Outstanding		Weighted-Average Grant Date Fair Value
Unvested balances at December 31, 2018	997,014		$	23.93
Awards vested	(57,205	)	22.50
Unvested balances at March 31, 2019	939,809		$	24.01

Restricted stock unit activity

Restricted stock unit activity during the three months ended March 31, 2019 was as follows:

	Number of Restricted Stock Units Outstanding		Weighted-Average Grant Date Fair Value
Unvested balances at December 31, 2018	—		$	—
Units granted	414,700		34.35
Units vested	(33,750	)	34.35
Unvested balances at March 31, 2019	380,950		$	34.35

Schedule of stock option activity

Stock option activity during the three months ended March 31, 2019 was as follows:

	Number of Options Outstanding		Weighted– Average Exercise Price
Outstanding at December 31, 2018	408,899		$	8.08
Options exercised	(17,280	)	7.34
Options forfeited	(556	)	7.74
Options expired	(309	)	1.49
Outstanding at March 31, 2019	390,754		$	8.13

Schedule of allocated share-based compensation expense

The Company recognized stock-based compensation expense from all awards in the following expense categories (in thousands):

	Three Months Ended March 31,
	2019		2018
Cost of revenue	$	160	$	77
Research and development	322		113
Sales and marketing	139		46
General and administrative	4,007		2,341
Total	$	4,628	$	2,577