CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data	Oct. 01, 2011	Jan. 01, 2011	Oct. 02, 2010
Property and equipment, accumulated depreciation and amortization (in dollars)	$ 18,676	$ 15,627	$ 15,403
Intangible assets, accumulated amortization (in dollars)	$ 3,517	$ 3,077	$ 2,930
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized	45,000,000	150,000,000	19,053,345
Common stock, shares issued	15,911,135	15,405,677	203,235
Common stock, shares outstanding	15,911,135	15,405,677	203,235
Preferred stock, Series C
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized	0	0	30,000
Preferred stock, shares issued	0	0	30,000
Preferred stock, shares outstanding	0	0	30,000
Preferred stock, Series A
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized	0	0	325,000
Preferred stock, shares issued	0	0	308,820
Preferred stock, shares outstanding	0	0	308,820
Preferred stock, Series B
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized	0	0	175,000
Preferred stock, shares issued	0	0	158,386
Preferred stock, shares outstanding	0	0	158,386
Undesignated preferred stock
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000	5,000,000
Preferred stock, shares issued	0	0	0
Preferred stock, shares outstanding	0	0	0