INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

The geographical breakdown of the Company’s loss before income taxes for the year ended December 31, 2015, 2014 and 2013 is as follows:

	Year Ended December 31,
	2015			2014			2013
	(in thousands)
Domestic	$	(39,635	)	$	(23,663	)	$	(26,461	)
Foreign	(6,208		)	(6,451		)	(6,340		)
Loss before income Taxes	$	(45,843	)	$	(30,114	)	$	(32,801	)

Schedule of Components of Income Tax Provision

The components of the income tax provision are as follows:

	Year Ended December 31,
	2015			2014			2013
	(in thousands)
Current:
State	$	(39	)	$	93		$	12
Federal	—			—			—
Foreign	638			337			375
Total current	$	599		$	430		$	387
Deferred:
State	$	—		$	(1	)	$	6
Federal	12			12			33
Foreign	(259		)	—			—
Total deferred	$	(247	)	$	11		$	39
Total income tax provision	$	352		$	441		$	426

Schedule of Effective Income Tax Rate Reconciliation

The reconciliation of federal statutory income tax provision to the Company’s effective income tax provision is as follows:  

	Year Ended December 31,
	2015			2014			2013
	(in thousands)
U.S. federal taxes at statutory tax rate	$	(15,587	)	$	(10,239	)	$	(11,152	)
State taxes, net of federal benefit	(26		)	61			12
Change in valuation allowance	12,309			6,662			7,624
Foreign tax rate differential	2,752			2,509			2,530
Warrant revaluation	—			(31		)	757
Stock-based compensation	1,775			2,025			1,198
Tax credits	(785		)	(627		)	(906		)
Other	(86		)	81			363
Provision for income taxes	$	352		$	441		$	426

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant components of our deferred tax assets for federal and state income taxes are as follows:

	As of December 31,
	2015			2014
	(in thousands)
Deferred tax assets:
Net operating loss carryforwards	40,357			36,626
Research and development credits	5,192			4,720
Accruals and reserves	3,044			1,304
Deferred revenue	10,068			3,558
Stock-based compensation	2,290			1,510
Other	440			276
Gross deferred tax assets	61,391			47,994
Valuation allowance	(58,838		)	(47,992		)
Total deferred tax assets	$	2,553		$	2
Deferred tax liabilities:
internally developed software	$	(2,303	)	$	—
Goodwill	$	(63	)	$	(52	)
Gross deferred tax liabilities	$	(2,366	)	$	(52	)
Net deferred tax asset (liabilities)	$	187		$	(50	)

Summary of Operating Loss Carryforwards

The net operating loss and tax credit carryforwards as of December 31, 2015, are as follows:  

	Amount	Year Begin to Expire
	(in thousands)
Net operating losses, federal	105,972	2026
Net operating losses, state	79,832	2016
Research and development credits, federal	4,360	2026
Research and development credits, state	4,934	No expiration

Summary of Tax Credit Carryforwards

The net operating loss and tax credit carryforwards as of December 31, 2015, are as follows:  

	Amount	Year Begin to Expire
	(in thousands)
Net operating losses, federal	105,972	2026
Net operating losses, state	79,832	2016
Research and development credits, federal	4,360	2026
Research and development credits, state	4,934	No expiration

Schedule of Unrecognized Tax Benefits Roll Forward

The following is a reconciliation of the beginning and ending amount of the Company’s total gross unrecognized tax benefit liabilities:  

	Year Ended December 31,
	2015		2014		2013
	(in thousands)
Gross unrecognized tax benefit - beginning balance	$	2,539	$	1,797	$	940
Increases related to tax positions from prior years	—		—		172
Increases related to tax positions taken during current year	777		742		685
Gross unrecognized tax benefit - ending balance	$	3,316	$	2,539	$	1,797