Note 3 - Business Combinations (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		6 Months Ended		1 Months Ended	3 Months Ended		6 Months Ended		0 Months Ended		1 Months Ended	3 Months Ended	6 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Oct. 31, 2014 Subsequent Event [Member] Integrated Memory Logic Limited [Member]	Sep. 28, 2014 Pro Forma [Member] Integrated Memory Logic Limited [Member]	Sep. 29, 2013 Pro Forma [Member] Integrated Memory Logic Limited [Member]	Sep. 28, 2014 Pro Forma [Member] Integrated Memory Logic Limited [Member]	Sep. 29, 2013 Pro Forma [Member] Integrated Memory Logic Limited [Member]	Sep. 15, 2014 Integrated Memory Logic Limited [Member]	Jun. 03, 2014 Integrated Memory Logic Limited [Member]	Sep. 28, 2014 Integrated Memory Logic Limited [Member]	Sep. 28, 2014 Integrated Memory Logic Limited [Member]	Sep. 28, 2014 Integrated Memory Logic Limited [Member]	Jan. 14, 2014 Stretch, Inc. [Member]	Mar. 30, 2014 Stretch, Inc. [Member]	Jul. 05, 2013 Cadeka Microcircuits [Member]	Mar. 30, 2014 Cadeka Microcircuits [Member]
Note 3 - Business Combinations (Details) [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired										100.00%	92.00%	8.00%	8.00%	8.00%
Payments to Acquire Businesses, Gross					$ 18,900,000						$ 206,411,000
Business Combination, Consideration Transferred											228,118,000	18,900,000			10,000		34,837,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares)												1.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities												3,800,000	3,800,000	3,800,000	10,604,000		8,216,000
Acquired Intangible Assets Discount Rate											16.90%
Goodwill, Acquired During Period										14,700,000				14,700,000	700,000	700,000	19,400,000	19,400,000
Business Combination, Acquisition Related Costs	2,726,000	144,000	6,776,000	609,000		3,000,000	0	11,200,000	0				3,000,000	7,200,000
Amortization of Intangible Assets	3,137,000	2,098,000	6,682,000	3,448,000		0	2,400,000	2,400,000	4,900,000
Allocated Share-based Compensation Expense	3,600,000	3,623,000	6,727,000	4,710,000		100,000	500,000	300,000	600,000
Increase (Decrease) in Intangible Assets, Current						0	(100,000)	(100,000)	(200,000)
Stock or Unit Option Plan Expense						200,000	400,000	400,000	100,000
Income Tax Expense (Benefit)	$ 107,000	$ (6,767,000)	$ 799,000	$ (6,776,000)		$ 400,000	$ 300,000	$ 600,000	$ 600,000
Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Period (in years)															15 years