Note 11 - Share-Based Compenseation (Details) - Outstanding stock options (USD $)	6 Months Ended
	Sep. 29, 2013
Outstanding stock options [Abstract]
Options outstanding at March 31, 2013 (in Shares)	429,500
Options outstanding at March 31, 2013	$ 13.29
Options outstanding at March 31, 2013	2 years 266 days
Options outstanding at March 31, 2013 (in Dollars)	$ 12,437,000
Options outstanding at September 29, 2013 (in Shares)	322,000
Options outstanding at September 29, 2013	$ 14.51
Options outstanding at September 29, 2013	2 years 171 days
Options outstanding at September 29, 2013 (in Dollars)	12,949,000
Options exercisable at September 29, 2013 (in Shares)	233,250
Options exercisable at September 29, 2013	$ 13.27
Options exercisable at September 29, 2013	2 years 138 days
Options exercisable at September 29, 2013 (in Dollars)	9,667,000
Granted (in Shares)	0
Granted	$ 0
Granted	0 years
Granted	$ 0
Expired (in Shares)	0
Expired	$ 0
Expired	0 years
Expired	$ 0
Exercised (in Shares)	(107,500)
Exercised	$ 9.66
Exercised	0 years
Exercised (in Dollars)	$ 0