Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2015

Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

A summary of the Company’s restricted stock units (“RSUs”) activity and weighted average exercise prices follows:

	Number of Shares	Weighted Average Grant Date Fair Value (Per Share)		Aggregate Fair Value (in thousands)
Balance outstanding at December 31, 2014	—	$	—	$	—
Granted	1,256,500	—		—
Exercised	—	—
Forfeited	—
Non-vested and outstanding at June 30, 2015	1,256,500	$	2.08	$	12,326
Expected to vest at June 30, 2015	876,364	$	2.05	$	8,597

Summary of Stock-Based Compensation Expense Related to Employee Stock Options

The following table summarizes stock-based compensation expense related to employee stock options under ASC 718-10 included in Company’s statements of operations for the periods presented (amounts in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2015		2014		2015		2014
Cost of revenue	$	476	$	484	$	804	$	844
Sales and marketing expense	937		923		1,532		1,737
Product development expense	953		931		1,892		1,611
General and administrative expense	746		869		1,678		1,712
Total stock-based compensation included in costs and expenses	$	3,112	$	3,207	$	5,906	$	5,904

Weighted Average Assumptions of Fair Value Options Using Black-Scholes Option-Pricing Model

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2015	2014	2015	2014
Dividend yield	0.0%	0.0%	0.0%	0.0%
Risk-free interest rate	1.4%	1.6% - 1.7%	1.3% - 1.4%	1.5% - 1.7%
Expected life (in years)	5	5	5	5
Historical volatility	49.4%	52.6% - 53.2%	49.4% - 49.7%	52.6% - 53.7%

Summary of Stock Option Activity and Weighted Average Exercise Prices

A summary of the Company’s stock option activity and weighted average exercise prices follows:

	Stock Option Activity				Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
	Options		Weighted Average Exercise Price
Balance outstanding at December 31, 2014	10,769,149		$	10.95
Granted	738,250		10.27
Exercised	(478,663	)	4.31
Cancelled or expired	(926,578	)	12.32
Balance outstanding at June 30, 2015	10,102,158		$	11.83	7.04	$	7,388
Options vested and expected to vest at June 30, 2015	8,831,900		$	11.09	6.79	$	7,302
Options exercisable at June 30, 2015	5,025,493		$	10.61	5.69	$	6,953

Summary of Status of Nonvested Shares

A summary of the status of the Company’s nonvested shares as of December 31, 2014, and changes during the six months endedJune 30, 2015 is as follows:

	Options		Weighted Average Grant- Date Fair Value
Nonvested Shares at December 31, 2014	6,032,315		$	5.66
Granted	738,250		4.54
Vested	(767,322	)	2.85
Cancelled or expired	(926,578	)	6.04
Nonvested Shares at June 30, 2015	5,076,665		$	5.54