Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data	Oct. 02, 2011	Dec. 31, 2010
Current assets:
Reserves for accounts receivable	$ 1,190	$ 1,235
Shareholders' equity:
Common stock, par value	$ 0.002	$ 0.002
Common stock, shares authorized	140,000	140,000
Common stock, shares issued	42,075	41,065