Note 12 - Stock-based Compensation (Details) - Stock Option Transactions (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	12 Months Ended
	Dec. 28, 2014	Mar. 30, 2014
Stock Option Transactions [Abstract]
Options Outstanding	8,042,840	7,213,848
Weighted Average Exercise Price of Options Outstanding (in Dollars per share)	$ 8.74	$ 8.98
Weighted Average Remaining Contractual Term of Options Outstanding	4 years 354 days	5 years 7 days
Aggregate Intrinsic Value (in Dollars)	$ 15,344	$ 21,301
In-the-Money Options Vested and Exercisable	2,959,000	2,170,000
Vested and expected to vest, December 28, 2014	7,487,866
Vested and expected to vest, December 28, 2014 (in Dollars per share)	$ 8.66
Vested and expected to vest, December 28, 2014	4 years 321 days
Vested and expected to vest, December 28, 2014 (in Dollars)	14,864
Vested and exercisable, December 28, 2014	3,361,788
Vested and exercisable, December 28, 2014 (in Dollars per share)	$ 7.64
Vested and exercisable, December 28, 2014	3 years 295 days
Vested and exercisable, December 28, 2014 (in Dollars)	$ 9,629
Granted	2,517,178
Granted (in Dollars per share)	$ 8.64
Exercised	(523,193)
Exercised (in Dollars per share)	$ 6.85
Cancelled	(183,895)
Cancelled (in Dollars per share)	$ 12.76
Forfeited	(981,008)
Forfeited (in Dollars per share)	$ 10.49