CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $) In Thousands	Common Stock	Accumulated Other Comprehensive Gain (Loss)	Retained Earnings	Total	Comprehensive Income
Balance at Mar. 28, 2009	$ 59,549	$ (5,494)	$ 113,521	$ 167,576	$ 0
Balance (in shares) at Mar. 28, 2009	12,872
Stock options exercised	1,060	0	0	1,060
Stock options exercised (in shares)	66
Issuance of shares under ESPP	154	0	0	154
Issuance of shares under ESPP (in shares)	6
Stock-based compensation expense	3,470	0	0	3,470
Excess tax benefit from stock-based compensation plans	63	0	0	63
Net income	0	0	5,125	5,125	5,125
Unrealized gain from available-for-sale investments, net of taxes	0	2,928	0	2,928	2,928
Balance at Apr. 03, 2010	64,296	(2,566)	118,646	180,376	8,053
Balance (in shares) at Apr. 03, 2010	12,944
Stock options exercised	2,355	0	0	2,355
Stock options exercised (in shares)	130
Issuance of shares under ESPP	178	0	0	178
Issuance of shares under ESPP (in shares)	7
Stock repurchase	(1,442)	0	(4,825)	(6,267)
Stock repurchase (in shares)	(273)
Stock-based compensation expense	3,099	0	0	3,099
Excess tax benefit from stock-based compensation plans	13	0	0	13
Net income	0	0	12,282	12,282	12,282
Unrealized gain from available-for-sale investments, net of taxes	0	883	0	883	883
Balance at Apr. 02, 2011	68,499	(1,683)	126,103	192,919	13,165
Balance (in shares) at Apr. 02, 2011	12,808			12,808
Stock options exercised	1,317	0	0	1,317
Stock options exercised (in shares)	77
Issuance of shares under ESPP	159	0	0	159
Issuance of shares under ESPP (in shares)	8
Stock repurchase	(4,893)	0	(12,246)	(17,139)
Stock repurchase (in shares)	(901)
Stock-based compensation expense	3,031	0	0	3,031
Excess tax benefit from stock-based compensation plans	(82)	0	0	(82)
Net income	0	0	4,749	4,749	4,749
Unrealized gain from available-for-sale investments, net of taxes	0	338	0	338	338
Balance at Mar. 31, 2012	$ 68,031	$ (1,345)	$ 118,606	$ 185,292	$ 5,087
Balance (in shares) at Mar. 31, 2012	11,992			11,992