Income Taxes (Tables)

12 Months Ended

Mar. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Income Before Income Tax

Loss from operations before income tax consists of the following (in thousands):

	Fiscal Years Ended March 31,
	2015			2014			2013
Loss from operations before income tax:
Domestic loss	$	(53,706	)	$	(8,976	)	$	(130,552	)
Foreign income (loss)	2,740			3,901			(4,117		)
	$	(50,966	)	$	(5,075	)	$	(134,669	)

Schedule of Components of Income Tax Expense (Benefit)

Income tax expense (benefit) from operations consists of the following (in thousands):

	Fiscal Years Ended March 31,
	2015			2014			2013
Current:
Federal	$	(17	)	$	(20	)	$	(1,106	)
Foreign	1,206			819			847
State	(1		)	6			(129		)
Total Current	1,188			805			(388		)
Deferred:
Foreign	(96		)	(186		)	(166		)
State	—			—			—
Total Deferred	(96		)	(186		)	(166		)
	$	1,092		$	619		$	(554	)

Schedule of Effective Income Tax Rate Reconciliation

The provision (benefit) for income taxes reconciles to the amount computed by applying the federal statutory rate of 35% to the loss before income taxes as follows for operations (in thousands):

	Fiscal Years Ended March 31,
	2015					2014					2013
	$			%		$			%		$			%
Tax at federal statutory rate	$	(17,838	)	35	%	$	(1,776	)	35	%	$	(47,134	)	35	%
Tax benefit from loss from continuing operations	—			—		—			—		(925		)	1
Other permanent differences	979			(2	)	(6,561		)	129		1,195			(1	)
State taxes, net of federal benefit	(2,345		)	5		(214		)	4		(7,263		)	5
Federal tax credits	(1,553		)	3		(1,778		)	35		(1,909		)	1
State tax credits	(460		)	1		(444		)	9		(537		)	—
Veloce accrued liability	3,655			(7	)	16,740			(330	)	26,749			(20	)
Refundable credits	(16		)	—		—			—		—			—
Sale of TPack	—			—		2,688			(53	)	—			—
Valuation allowance	18,445			(36	)	(7,809		)	154		28,715			(21	)
Change in contingency reserve	(67		)	—		(64		)	1		74			—
Other	292			(1	)	(163		)	4		481			—
	$	1,092		(2	)%	$	619		(12	)%	$	(554	)	—	%

Schedule of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities for federal and state income taxes are as shown below (in thousands):

	Fiscal Years Ended March 31,
	2015			2014
Deferred tax assets:
Net operating loss carryforwards	$	315,773		$	294,910
Research and development credit carryforwards	81,546			79,839
Inventory write-downs and other reserves	7,642			8,068
Capitalization of research and development costs	6,245			5,915
Goodwill	3,147			4,007
Intangible assets	26,031			32,290
Investment impairment	3,982			3,494
Stock-based compensation	28,921			26,664
Depreciation and amortization	1,903			3,253
Other	970			1,182
Total deferred tax assets	476,160			459,622
Valuation allowance	(475,545		)	(459,081		)
	$	615		$	541

Schedule of Unrecognized Tax Benefits Roll Forward

The following is a tabular reconciliation of the Unrecognized Tax Benefits activity during the fiscal year ended March 31, 2015 (in thousands):

Opening Balance	$	44,231
Gross decreases - tax positions in prior period	122
Gross increases - current-period tax positions	726
Ending Balance	$	45,079