Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Data (Detail)

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Quarterly Financial Data (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 30, 2012
Sep. 23, 2012
Jun. 24, 2012
Mar. 25, 2012
Dec. 25, 2011
Sep. 25, 2011
Jun. 26, 2011
Mar. 27, 2011
Dec. 30, 2012
Dec. 25, 2011
Dec. 26, 2010
Quarterly Financial Data [Line Items]                      
Revenue $ 46,680 $ 44,939 $ 43,545 $ 37,476 $ 33,262 $ 35,115 $ 32,997 $ 29,209 $ 172,640 $ 130,583 $ 94,908
Operating income 3,700 [1] 3,416 [1] 4,354 [1] 1,826 [1] 1,932 [2] 2,938 [2] 1,888 [2] 2,702 [2] 13,296 9,460 8,303
Net income $ 2,555 [3] $ 790 [3] $ 1,731 [3] $ 381 [3] $ 318 $ 1,208 $ 674 $ 1,264 $ 5,457 $ 3,464 $ 3,291
Basic earnings per share $ 0.05 $ 0.05 $ 0.16 $ 0.01 $ 0.02 $ 0.08 $ 0.05 $ 0.09 $ 0.48 $ 0.21 $ (17.18)
Diluted earnings per share $ 0.05 $ 0.05 $ 0.15 $ 0.01   $ 0.08 $ 0.04 $ 0.09 $ 0.37 $ 0.20 $ (17.18)
[1] Contains a termination payment to the Sponsor to terminate its advisory agreement, in the first quarter of 2012, which decreased income from operations by $2,000; contains expenses related to the secondary offering , in the fourth quarter of 2012, which decreased income from operations by $228.
[2] Contains a recording of a settlement with a former director and the payment of a one-time cash bonus to certain members of management, in the second quarter of 2011, which decreased income from operations by $1,264.
[3] Contains a write off of unamortized loan origination fees related to the portion of long term debt that was repaid, in the third quarter of 2012, which decreased net income by $1,134.