Balance Sheet Account Details (Tables)

6 Months Ended

Jun. 30, 2012

Balance Sheet Account Details [Abstract]

Summary of short-term investments

The following table shows the fair values and the gross unrealized losses of these available-for-sale securities aggregated by investment category (in thousands):

	June 30, 2012
	Fair Value		Gross Unrealized Losses
Commercial paper	$	1,999	$	(1	)
Corporate notes and bonds		8,621		(8	)
Total	$	10,620	$	(9	)

Fair values and the gross unrealized losses of available-for-sale securities aggregated by investment category

Property and equipment, net consists of the following (in thousands):

	June 30, 2012			December 31, 2011
Computer equipment and software	$	32,479		$	16,586
Furniture and fixtures		1,969			1,755
Leasehold improvements		2,907			2,795
Construction in progress		6,470			3,740
		43,825			24,876
Less: accumulated depreciation		(8,373	)		(4,181	)
Total property and equipment, net	$	35,452		$	20,695

Schedule of property and equipment, net

Accrued expenses and other current liabilities consists of the following (in thousands):

	June 30, 2012		December 31, 2011
Taxes payable	$	2,734	$	7,399
Bonuses and commissions		6,284		6,080
Accrued compensation		7,674		3,570
Accrued third-party professional services		2,165		1,919
Other employee expenses		2,404		1,809
Other		8,397		4,831
Total accrued expenses and other current liabilities	$	29,658	$	25,608

Accrued expenses and other current liabilities

The following table presents the Company’s hierarchy for assets and liabilities measured at fair value on a recurring basis as of June 30, 2012 (in thousands):

	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	191	$	—	$	—	$	191
Commercial paper		—		2,015		—		2,015
Short-term investments:
Commercial paper		—		5,996		—		5,996
Corporate notes and bonds		—		14,776		—		14,776
U.S. government agency securities		—		2,023		—		2,023
Total	$	191	$	24,810	$	—	$	25,001