Note 12 - Stock-Based Compensation (Details) (USD $)	3 Months Ended		6 Months Ended			1 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended			6 Months Ended		1 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended	1 Months Ended	6 Months Ended						3 Months Ended	6 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Mar. 30, 2014	Jan. 31, 2014 Performance-Based RSUs [Member] Chief Executive Officer [Member]	Mar. 31, 2012 Performance-Based RSUs [Member] Chief Executive Officer [Member]	Jan. 31, 2012 Performance-Based RSUs [Member] Chief Executive Officer [Member]	Sep. 28, 2014 Performance-Based RSUs [Member] Chief Executive Officer [Member]	Sep. 29, 2013 Performance-Based RSUs [Member] Chief Executive Officer [Member]	Sep. 28, 2014 Performance-Based RSUs [Member] Chief Executive Officer [Member]	Sep. 29, 2013 Performance-Based RSUs [Member] Chief Executive Officer [Member]	Sep. 28, 2014 Performance-Based RSUs [Member] Certain Executives [Member]	Sep. 29, 2013 Performance-Based RSUs [Member] Certain Executives [Member]	Jun. 30, 2013 Performance-Based RSUs [Member] Certain Executives [Member]	Sep. 28, 2014 Performance-Based RSUs [Member] Certain Executives [Member]	Sep. 29, 2013 Performance-Based RSUs [Member] Certain Executives [Member]	Jan. 31, 2014 Performance-Based RSUs [Member] Former Stretch Employees [Member]	Sep. 28, 2014 Performance-Based RSUs [Member] Former Stretch Employees [Member]	Sep. 28, 2014 Performance-Based RSUs [Member] Former Stretch Employees [Member]	Sep. 28, 2014 Performance-Based RSUs [Member] 2014 Incentive Program [Member]	Sep. 28, 2014 Performance-Based RSUs [Member] 2014 Incentive Program [Member]	Sep. 28, 2014 Employee Stock Option [Member] Chief Executive Officer [Member]	Sep. 29, 2013 Employee Stock Option [Member] Chief Executive Officer [Member]	Sep. 28, 2014 Employee Stock Option [Member] Chief Executive Officer [Member]	Sep. 29, 2013 Employee Stock Option [Member] Chief Executive Officer [Member]	Sep. 28, 2014 Restricted Stock Units (RSUs) [Member] Cadeka Employees [Member]	Sep. 28, 2014 Restricted Stock Units (RSUs) [Member] Cadeka Employees [Member]	Sep. 28, 2014 Restricted Stock Units (RSUs) [Member]	Sep. 28, 2014 October 2013 PRSUs [Member] Certain Executives [Member]	Oct. 31, 2013 October 2013 PRSUs [Member] Certain Executives [Member]	Sep. 28, 2014 October 2013 PRSUs [Member] Certain Executives [Member]	Sep. 28, 2014 Employee Stock Participation Plan [Member]	Jun. 30, 2014 2006 Plan and Sipex 2006 Plan [Member]	Jun. 30, 2014 2006 Plan [Member]	Sep. 28, 2014 2014 Plan [Member]	Sep. 18, 2014 2014 Plan [Member]	Sep. 28, 2014 2015 Incentive Program [Member]	Sep. 28, 2014 2015 Incentive Program [Member]
Note 12 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent																																	95.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)	8,420,307		8,420,307		7,213,848																													6,555,492
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	4,500,000		4,500,000																																669,008		5,170,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)																																				5,100,000
Share Price (in Dollars per share)	$ 9.07		$ 9.07		$ 11.71
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)			2,117,738			140,000		480,000
Share Based Compensation Arrangement By Share Based Payment Award, Vesting, Number of Installments							3	4							3			3													3
Allocated Share-based Compensation Expense	$ 3,600,000	$ 3,623,000	$ 6,727,000	$ 4,710,000					$ 146,000	$ 470,000	$ 880,000	$ 522,000	$ 22,000	$ 148,000		$ (98,000)	$ 148,000		$ 169,000	$ 169,000	$ (295,000)	$ (290,000)	$ 75,000	$ 65,000	$ 187,000	$ 130,000	$ 619,000	$ 1,013,000		$ 108,000		$ 286,000						$ 577,000	$ 577,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)							300,000								50,000			82,500											204,697		70,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period							3 years																								3 years