Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Jan. 01, 2013	Jan. 03, 2012
Operating activities
Net income	$ 6,665	$ 5,163	$ 3,829
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	20,623	16,719	14,501
Provision for deferred income taxes	4,206	2,607	1,520
Excess tax benefit on stock-based compensation	(201)	(27)	(109)
Asset disposals, closure costs and restaurant impairments	1,164	1,278	1,629
Amortization of debt issuance costs and debt extinguishment expense	710	3,227	1,013
Stock-based compensation	4,230	1,234	1,327
Other noncash	(248)	(341)	892
Changes in operating assets and liabilities:
Accounts receivable and income tax receivable	538	(1,124)	166
Inventories	(1,181)	(1,447)	(680)
Prepaid expenses and other assets	(1,518)	(644)	(63)
Accounts payable	(230)	(155)	80
Deferred rent	5,833	4,369	2,290
Income taxes	392	20	108
Accrued expenses and other liabilities	2,651	1,190	1,419
Net cash provided by operating activities	43,634	32,069	27,922
Investing activities
Purchases of property and equipment	(54,429)	(47,384)	(30,047)
Net cash used in investing activities	(54,429)	(47,384)	(30,047)
Financing activities
Proceeds from issuances of long-term debt	136,357	105,697	111,771
Payments on long-term debt	(224,526)	(89,549)	(65,498)
Payments on bridge financing	0	0	(45,977)
Debt issuance costs	(124)	(754)	(4,226)
Change in restricted cash related to equity recapitalization	0	0	189,388
Change in shareholder escrow-equity recapitalization	0	0	(189,502)
Acquisition of treasury stock	(2,777)	0	0
Payment of payroll taxes associated with equity recapitalization	0	0	(6,602)
Issuance of common stock, net of transaction expenses	100,069	(48)	(133)
Proceeds from exercise of stock options, warrants and employee stock purchase plan	1,982	0	16
Excess tax benefit on stock-based compensation	201	27	109
Net cash provided by (used in) financing activities	11,182	15,373	(10,654)
Net increase (decrease) in cash and cash equivalents	387	58	(12,779)
Cash and cash equivalents
Beginning of year	581	523	13,302
End of year	$ 968	$ 581	$ 523