Note 14 - Stock-based Compensation (Details) - Stock Option Transactions (USD $)	12 Months Ended
	Mar. 29, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding (in Shares)	7,609,622
Options Outstanding, Weighted Average Remaining Contractual Terms (in years)	4 years 313 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 8.77
Options Exercisable (in Shares)	3,318,443
Options Exercisable, Weighted Average Exercise Price per Share	$ 7.78
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 1.57
Range of Exercise Prices, Upper Limit	$ 6.43
Options Outstanding (in Shares)	1,951,070
Options Outstanding, Weighted Average Remaining Contractual Terms (in years)	3 years 116 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 6.12
Options Exercisable (in Shares)	1,493,854
Options Exercisable, Weighted Average Exercise Price per Share	$ 6.04
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 6.60
Range of Exercise Prices, Upper Limit	$ 8.51
Options Outstanding (in Shares)	1,693,928
Options Outstanding, Weighted Average Remaining Contractual Terms (in years)	4 years 105 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 7.85
Options Exercisable (in Shares)	909,929
Options Exercisable, Weighted Average Exercise Price per Share	$ 7.79
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 8.57
Range of Exercise Prices, Upper Limit	$ 9.55
Options Outstanding (in Shares)	1,583,739
Options Outstanding, Weighted Average Remaining Contractual Terms (in years)	5 years 346 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 9.22
Options Exercisable (in Shares)	361,184
Options Exercisable, Weighted Average Exercise Price per Share	$ 9.15
Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 9.57
Range of Exercise Prices, Upper Limit	$ 11.64
Options Outstanding (in Shares)	1,594,345
Options Outstanding, Weighted Average Remaining Contractual Terms (in years)	5 years 313 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 10.55
Options Exercisable (in Shares)	358,156
Options Exercisable, Weighted Average Exercise Price per Share	$ 10.73
Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 11.79
Range of Exercise Prices, Upper Limit	$ 13.93
Options Outstanding (in Shares)	786,540
Options Outstanding, Weighted Average Remaining Contractual Terms (in years)	5 years 244 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 12.82
Options Exercisable (in Shares)	195,320
Options Exercisable, Weighted Average Exercise Price per Share	$ 13.15