Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Summary of the Changes in the Company's Allowance for Doubtful Accounts

Below is a summary of the changes in the Company’s allowance for doubtful accounts for the years ended December 31, 2013, 2012 and 2011.

	Balance at Beginning of Period		Provision		Acquired in Business Combinations		Write-offs, Net of Recoveries			Balance at End of Period
Year ended December 31, 2011	$	1,026	$	316	$	—	$	(280	)	$	1,062
Year ended December 31, 2012	$	1,062	$	827		—	$	(978	)	$	911
Year ended December 31, 2013	$	911	$	564		—	$	(562	)	$	913

Estimated Useful Lives of Property and Equipment

Depreciation is calculated on the straight-line method based on the month the asset is placed in service over the following estimated useful lives:

	Estimated Useful Life
Furniture and fixtures	5 years
Computer equipment and software	2–3 years
Internal-use software and website development costs	3–4 years
Leasehold improvements	Shorter of useful life or remaining duration of lease

Property and Equipment

Property and equipment consists of the following:

	As of December 31,
	2013			2012
Furniture and fixtures	$	848		$	1,277
Computer equipment and software		4,026			4,014
Leasehold improvements		1,294			1,362
Internal-use software and website development costs		15,028			12,817
		21,196			19,470
Less: accumulated depreciation and amortization		(11,739	)		(10,653	)
	$	9,457		$	8,817

Reconciliation of the Numerator and Denominator Used in the Calculation of Basic and Diluted Net (Loss) Income Per Share

A reconciliation of the numerator and denominator used in the calculation of basic and diluted net (loss) income per share is as follows:

	For the Years Ended December 31,
	2013			2012		2011
Numerator:
Net (loss) income	$	(1,837	)	$	4,024	$	4,689
Denominator:
Basic:
Weighted average shares of common stock and vested restricted stock awards outstanding		37,886,492			40,211,075		38,531,645
Diluted:
Weighted average shares of common stock and vested restricted stock awards outstanding		37,886,492			40,211,075		38,531,645
Effect of potentially dilutive shares		—			698,668		2,035,806
Total weighted average shares of common stock and vested restricted stock awards outstanding		37,886,492			40,909,743		40,567,451
Calculation of Net (Loss) Income Per Common Share:
Basic:
Net (loss) income applicable to common stockholders	$	(1,837	)	$	4,024	$	4,689
Weighted average shares of stock outstanding		37,886,492			40,211,075		38,531,645
Net (loss) income per common share	$	(0.05	)	$	0.10	$	0.12
Diluted:
Net (loss) income applicable to common stockholders	$	(1,837	)	$	4,024	$	4,689
Weighted average shares of stock outstanding		37,886,492			40,909,743		40,567,451
Net (loss) income per common share(1)	$	(0.05	)	$	0.10	$	0.12

(1) Shares used to calculate diluted earnings per share exclude 0.5 million shares related to outstanding stock options and unvested restricted stock awards for the year ended December 31, 2013 that would have been dilutive if the Company had net income during that period. Additionally, in calculating diluted earnings per share, 5.3 million, 4.2 million and 2.7 million shares related to outstanding stock options and unvested restricted stock awards were excluded for the years ended December 31, 2013, 2012 and 2011, respectively, because they were anti-dilutive.