Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Options Valuation Assumptions

Stock options valuation assumptions:

	Three			Nine
	Months			Months
	Ended			Ended
	September 30,			September 30,
	2017			2017
Expected life (years)		4.50			4.50
Expected volatility		57.24	%		57.24	%
Risk-free interest rate		1.77	%		1.77	%
Expected dividend yield		0	%		0	%

Allocation of Stock-Based Compensation

Stock-based Compensation

	Three		Three		Nine		Nine
	Months		Months		Months		Months
	Ended		Ended		Ended		Ended
	September 30,		September 30,		September 30,		September 30,
	2017		2016		2017		2016
Stock-based compensation:
Cost of revenue	$	170	$	196	$	521	$	553
Sales and marketing		364		265		1,074		715
Research, development and engineering		379		346		1,041		1,050
General and administrative		784		568		1,994		1,613
Intellectual property		82		80		242		231
Stock-based compensation expense		1,779		1,455		4,872		4,162
Capitalized to software and patent costs		53		46		151		121
Total stock-based compensation	$	1,832	$	1,501	$	5,023	$	4,283

Unrecognized Compensation Cost Related to Non-Vested Stock-Based Awards Granted

The following table sets forth total unrecognized compensation cost related to non-vested stock-based awards granted under all equity compensation plans, including stock options and restricted stock:

	As of		As of
	September 30,		December 31,
	2017		2016
Total unrecognized compensation costs	$	15,812	$	9,728

Weighted Average Period for Recognition of Unrecognized Compensation Cost for Stock Options and Restricted Stock

The Company expects to recognize the unrecognized compensation costs as of September 30, 2017 for stock options and restricted stock over weighted average periods through September 2021 as follows:

	Stock	Restricted
	Options	Stock
Weighted average period	1.63 years	1.48 years

Reconciliation of Outstanding Balance of Stock Options

The following table reconciles the outstanding balance of stock options:

				Weighted		Weighted
				Average		Average		Aggregate
				Exercise		Grant Date		Intrinsic
Three months ended September 30, 2017:	Options			Price		Fair Value		Value
Outstanding at June 30, 2017		362		$	20.60	$	9.45
Granted		200			30.50		14.58
Exercised		(15	)		14.99		8.12
Forfeited or expired		—			—		—
Outstanding at September 30, 2017		547		$	24.37	$	11.36	$	6,683

				Weighted		Weighted
				Average		Average		Aggregate
				Exercise		Grant Date		Intrinsic
Nine months ended September 30, 2017:	Options			Price		Fair Value		Value
Outstanding at December 31, 2016		421		$	19.06	$	9.01
Granted		200			30.50		14.58
Exercised		(74	)		10.73		6.67
Forfeited or expired		—			—		—
Outstanding at September 30, 2017		547		$	24.37	$	11.36	$	6,683
Exercisable at September 30, 2017		347		$	20.84			$	5,463
Unvested at September 30, 2017		200		$	30.50			$	1,220

Reconciliation of Unvested Balance of Restricted Stock

The following table reconciles the unvested balance of restricted stock:

				Weighted
				Average
	Number of			Grant Date
Three months ended September 30, 2017:	Shares			Fair Value
Unvested balance, June 30, 2017		492		$	27.67
Granted		72		$	30.22
Vested		(58	)	$	26.35
Forfeited		(1	)	$	27.43
Unvested balance, September 30, 2017		505		$	28.19

				Weighted
				Average
	Numberof			Grant Date
Nine months ended September 30, 2017:	Shares			Fair Value
Unvested balance, December 31, 2016		385		$	26.28
Granted		308		$	27.32
Vested		(180	)	$	22.77
Forfeited		(8	)	$	24.70
Unvested balance, September 30, 2017		505		$	28.19

Fair Value of Restricted Stock Awards Vested

The following table indicates the fair value of all restricted stock awards that vested during the three and nine months ended September 30, 2017 and 2016:

	Three		Three		Nine		Nine
	Months		Months		Months		Months
	Ended		Ended		Ended		Ended
	September 30,		September 30,		September 30,		September 30,
	2017		2016		2017		2016
Fair value of restricted stock awards vested	$	1,669	$	1,912	$	5,160	$	5,029