Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data	Oct. 01, 2011	Jan. 01, 2011
Current assets:
Allowance for doubtful accounts	$ 156	$ 63
Stockholders' equity:
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	47,000	47,000
Common stock, shares issued	22,951	22,315
Common stock, shares outstanding	22,951	22,315
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	3,000	3,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0