Income Taxes (Tables)

12 Months Ended

Jul. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Loss Before Provision for Income Taxes

Loss before provision for income taxes consisted of the following for the periods shown below:

	Year Ended July 31,
	2016			2015			2014
	(in thousands)
United States	$	(42,770	)	$	(51,336	)	$	(61,957	)
International	1,473			1,410			1,556
Total	$	(41,297	)	$	(49,926	)	$	(60,401	)

Schedule of Income Tax Expense

Income tax expense consisted of the following for the periods shown below:

	Year Ended July 31,
	2016			2015		2014
	(in thousands)
Current income tax provision:
Federal	$	—		$	—	$	—
State	—			4		—
Foreign	278			423		476
Total current tax provision	$	278		$	427	$	476
Deferred income tax provision
Federal	—			—		—
State	—			—		(96		)
Foreign	(63		)	—		12
Total deferred tax provision	(63		)	—		(84		)
Total income tax provision	$	215		$	427	$	392

Reconciliation of Federal Statutory Income Tax Provision to Effective Income Tax Provision

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

	Year Ended July 31,
	2016			2015			2014
	(in thousands)
Expected provision at U.S. federal statutory rate	$	(14,039	)	$	(16,975	)	$	(20,536	)
State income taxes—net of federal benefit	—			2			(96		)
Stock-based compensation	78			668			98
Common stock warrant	—			—			63
Tax credits	(941		)	(391		)	(225		)
Foreign tax rate differential	(30		)	(80		)	(67		)
Acquisition costs	—			—			125
Change in valuation allowance	15,301			17,570			20,790
Other	(154		)	(367		)	240
Total tax provision	$	215		$	427		$	392

Schedule of Deferred Tax Assets and Liabilities

Deferred tax assets and liabilities consisted of the following:

	July 31,
	2016			2015
	(in thousands)
Deferred tax assets:
Net operating loss carryforwards	$	81,822		$	75,812
Accrued liabilities	1,482			1,280
Tax credit carryforwards	5,859			3,759
Fixed assets	269			157
Deferred revenue	2,207			733
Stock-based compensation	1,996			806
Other	1			1
Valuation allowance	(92,846		)	(81,341		)
Total deferred tax assets	790			1,207
Deferred tax liabilities:
Intangible assets	(684		)	(1,163		)
Total deferred tax liabilities	(684		)	(1,163		)
Net deferred tax assets	$	106		$	44

	July 31,
	2016			2015
	(in thousands)
Recorded as:
Current deferred tax assets	$	—		$	1,076
Current valuation allowance	—			(1,050		)
Non-current deferred tax assets	92,908			81,477
Non-current valuation allowance	(92,802		)	(80,291		)
Current deferred tax liabilities	—			(5		)
Non-current deferred tax liabilities	—			(1,163		)
Net deferred tax assets	$	106		$	44

Summary of Activity Related to Unrecognized Tax Benefits

The following table summarizes the activity related to the Company’s unrecognized tax benefits:

	July 31,
	2016			2015
	(in thousands)
Balance at beginning of year	$	1,805		$	1,273
Increase related to prior year tax positions	202			194
Decrease related to prior year tax positions	(13		)	(20		)
Increase related to current year tax positions	605			358
Decrease related to lapse of statute of limitations	(48		)	—
Balance at end of year	$	2,551		$	1,805