Income Taxes (Tables)

6 Months Ended

Jun. 30, 2013

Income Taxes

Schedule of pretax loss

 Pretax loss was as follows:

	Year Ended December 31,
	2010			2011			2012
	(in thousands)
Loss before provision for income taxes:
Domestic	$	(11,816	)	$	(20,295	)	$	(29,119	)
Foreign		—			(2,305	)		(5,247	)
Total	$	(11,816	)	$	(22,600	)	$	(34,366	)

Schedule of provision for income taxes

The provision for income taxes consists of the following:

	Year Ended December 31,
	2010		2011		2012
	(in thousands)
Current tax provision:
Federal		—		—		—
State	$	1	$	6	$	3
Foreign		—		—		16
Total current tax provision		1		6		19
Deferred tax provision		—		—		—
Total provision for income taxes	$	1	$	6	$	19

Schedule of difference between income taxes computed at the federal statutory rate and the provision for income taxes

The items accounting for the difference between income taxes computed at the federal statutory rate and the provision for income taxes consist of the following:

	Year Ended December 31,
	2010			2011			2012
Federal statutory rate		34.00	%		34.00	%		34.00	%
Stock-based compensation		(0.42	)		(0.86	)		(1.54	)
Valuation allowance		(38.66	)		(31.06	)		(26.85	)
Foreign rate differential		0.00			(3.47	)		(5.24	)
Federal research and development credit		1.93			1.51			0.00
Other		3.15			(0.15	)		(0.43	)
Effective income tax rate		0.00	%		(0.03	)%		(0.06	)%

Schedule of components of deferred tax assets and liabilities

 The components of deferred tax assets and liabilities are as follows:

	Year Ended December 31,
	2010			2011			2012
	(in thousands)
Deferred tax assets:
Accounts receivable principally due to allowance for doubtful accounts	$	32		$	90		$	107
Compensated absences, principally due to accruals for financial reporting purposes		158			366			1,604
Net operating loss carryforwards		9,140			16,570			30,251
Federal tax credits		442			783			783
State tax credits		280			508			771
Other deductible temporary differences		213			487			521
Stock-based compensation		70			351			792
Deferred revenue		47			—			—
Total deferred tax assets		10,382			19,155			34,829
Deferred tax liabilities:
Capitalized software development		(164	)		(98	)		(37	)
Acquired intangible assets		—			—			(964	)
Total deferred tax liability		(164	)		(98	)		(1,001	)
Valuation allowance		(10,218	)		(19,057	)		(33,828	)
Net deferred taxes	$	—		$	—		$	—

Schedule of net operating loss carryforwards

 The Company had net operating loss carryforwards as follows:

	Year Ended December 31,
	2010		2011		2012
	(in thousands)
Federal	$	23,958	$	41,554	$	73,491
California		21,592		40,278		68,906
Foreign		—		2,111		6,791
Total	$	45,550	$	83,943	$	149,188

Schedule of research and development credit carryforwards

    The Company had research and development credit carryforwards as follows:

	Year Ended December 31,
	2010		2011		2012
	(in thousands)
Federal	$	442	$	783	$	783
California		424		770		1,169
Total	$	866	$	1,553	$	1,952