CASH AND CASH EQUIVALENTS AND INVESTMENTS (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Jun. 10, 2013	Dec. 29, 2012	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Unrealized gain on trading securities			$ 806,000	$ 250,000	$ 689,000
Proceeds from sales and maturity of short-term available-for-sale securities			95,883,000	166,681,000	142,098,000
ARS at par			15,050,000	28,050,000
ARS, estimated fair value			13,800,000	25,900,000
ARS redemptions at par value	12,950,000		13,000,000	4,700,000	36,450,000
ARS fully redeemed at par value	12,800,000
ARS partially redeemed at par value	150,000
Long term note receivable		300,000
Annual interest rate			5.00%
Right to invest additional amount in next financing round			$ 1,700,000
Maximum [Member]
Available for sale contractual maturities period			28 years
ARS, rate of resetting interval			35 days
Minimum [Member]
Available for sale contractual maturities period			24 years
ARS, rate of resetting interval			7 days