Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Consolidated Statements Of Operations [Abstract]
Net sales	$ 204,171	$ 150,695	$ 97,393
Cost of sales	124,956	98,352	75,436
Gross profit	79,215	52,343	21,957
Selling, engineering and administrative expenses	23,946	21,304	19,814
Operating income	55,269	31,039	2,143
Interest income, net	(775)	(653)	(562)
Foreign currency transaction (gain) loss, net	(161)	106	265
Miscellaneous (income) expense, net	(1,381)	(57)	423
Income before income taxes	57,586	31,643	2,017
Income tax provision	19,909	10,243	161
Net income	$ 37,677	$ 21,400	$ 1,856
Basic net income per common share	$ 1.47	$ 0.84	$ 0.07
Weighted average basic shares outstanding	25,642	25,428	25,256
Diluted net income per common share	$ 1.47	$ 0.84	$ 0.07
Weighted average diluted shares outstanding	25,684	25,478	25,305
Dividends declared per share	$ 0.403	$ 0.573	$ 0.300