Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Stock-Based Compensation

Schedule of the stock-based compensation expense

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2013		2012		2013
	(unaudited)				(unaudited)
Technology and development	$	91	$	134	$	206	$	249
Sales and marketing	237		287		529		566
General and administrative	363		341		756		686
	$	691	$	762	$	1,491	$	1,501

Summary of the Company's stock option award activity under all plans and related information, without regard for estimated forfeitures

	Exercisable		Weighted average exercise price		Non-vested		Weighted average exercise price		Outstanding		Weighted average exercise price
Stock option awards outstanding as of December 31, 2012	3,895,442		$	2.36	2,984,477		$	4.55	6,879,919		$	3.30
Stock option awards granted	—		$	—	566,305		$	7.09	566,305		$	7.09
Stock option awards forfeited	(51,671	)	$	3.95	(214,057	)	$	4.90	(265,728	)	$	4.72
Stock option awards exercised	(68,791	)	$	2.61	—		$	—	(68,791	)	$	2.61
Stock option awards vested	650,039		$	3.88	(650,039	)	$	3.88	—		$	—
Stock option awards outstanding as of June 30, 2013	4,425,019		$	2.55	2,686,686		$	5.21	7,111,705		$	3.56

Summary of the Company's restricted stock unit award activity

	Restricted Stock Unit Awards		Weighted Average Grant Date Fair Value (per share)
Balance at December 31, 2012	—		$	—
Restricted stock unit awards granted	50,000		$	10.00
Restricted stock unit awards forfeited	—		$	—
Restricted stock unit awards restriction lapses	—		$	—
Balance at June 30, 2013	50,000		$	10.00
Aggregate grant date fair value	$	500
Number of restricted stock unit awards vested during the six months ended June 30, 2013	—
Number of restricted stock unit awards non-vested at June 30, 2013	50,000