Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Apr. 03, 2016	Mar. 29, 2015
Deferred tax assets:
Research credits	$ 40,033	$ 31,487
Reserves and accruals not currently deductible	13,994	18,971
Net operating loss carryforwards	10,090	9,764
Stock-based compensation	8,112	14,415
Patent license	6,571	7,098
Property and equipment	4,382	2,587
Investment securities	904	913
Other	292	313
Total gross deferred tax assets	84,378	85,548
Valuation allowance	(22,742)	(20,307)
Total deferred tax assets, net of valuation allowance	61,636	65,241
Deferred tax liabilities:
State income taxes	13,398	10,547
Research and development expenditures	7,235	5,814
Total deferred tax liabilities	20,633	16,361
Net deferred tax assets	$ 41,003	$ 48,880