Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 25, 2012
Cash flows from operating activities:
Net income	$ 7,661	$ 6,095
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,605	3,707
Deferred income taxes	1,770	1,624
Non-cash interest expense	105	153
Debt issuance costs written-off	0	807
Amortization of below market lease	32	32
Stock-based compensation expense	657	434
Changes in operating assets and liabilities:
Accounts receivables	1,417	3,173
Inventories	510	(168)
Prepaid expenses and other	(362)	(110)
Other assets	4	1
Accounts payable and accrued expenses	(7,256)	(4,751)
Deferred revenue	(7,433)	(3,435)
Deferred rent	(356)	73
Other liabilities	1,247	34
Net cash provided by operating activities	1,601	7,669
Cash flows from investing activities:
Acquisition of property and equipment	(2,325)	(2,093)
Proceeds from sale of property and equipment	1,104	0
Net cash used in investing activities	(1,221)	(2,093)
Cash flows from financing activities:
Principal borrowings on long-term debt	2,000	64,000
Principal repayments on long-term debt	(4,000)	(9,000)
Redemption of Series A 10% redeemable convertible preferred stock	0	(59,740)
Dividend payments	0	(1,103)
Deferred financing costs	0	(610)
Other	35	6
Net cash used in financing activities	(1,965)	(6,447)
Net increase (decrease) in cash and cash equivalents	(1,585)	(871)
Cash and cash equivalents at beginning of period	7,909	3,925
Cash and cash equivalents at end of period	6,324	3,054
Cash paid during the period for:
Interest, net of capitalized interest	472	408
Income taxes	886	219
Noncash investing and financing activities:
Excess accrual-based acquisition of property and equipment	$ (163)	$ (565)