Summary of Significant Accounting Policies - Insurance and Revenues (Details)
|
|
1 Months Ended |
3 Months Ended |
9 Months Ended |
12 Months Ended |
|
|
May 02, 2017
USD ($)
$ / shares
shares
|
Nov. 30, 2016
derivative
|
Nov. 24, 2016
derivative
|
Sep. 28, 2017
USD ($)
|
Sep. 29, 2016
USD ($)
|
Sep. 28, 2017
USD ($)
|
Sep. 29, 2016
USD ($)
|
Dec. 29, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 25, 2014
USD ($)
|
Dec. 26, 2013
derivative
|
Jan. 01, 2016
USD ($)
|
| Self-Insurance Reserves |
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum loss before additional coverage applies |
|
|
|
|
|
$ 7,000,000
|
|
$ 5,000,000
|
|
|
|
|
| Derivative Financial Instruments |
|
|
|
|
|
|
|
|
|
|
|
|
| Cash flow hedge ineffectiveness during the period |
|
|
|
|
|
0
|
$ 0
|
0
|
$ 0
|
|
|
|
| Revenue Recognition and Gift Cards |
|
|
|
|
|
|
|
|
|
|
|
|
| Gift card breakage income |
|
|
|
|
|
568,000
|
452,000
|
627,000
|
511,000
|
$ 355,000
|
|
|
| Sales Returns and Allowances |
|
|
|
|
|
|
|
|
|
|
|
|
| Allowance for sales returns |
|
|
|
$ 6,892,000
|
|
6,892,000
|
|
4,887,000
|
3,720,000
|
|
|
|
| Advertising and Pre-opening Expense |
|
|
|
|
|
|
|
|
|
|
|
|
| Pre-opening expenses |
|
|
|
6,700,000
|
$ 5,046,000
|
13,825,000
|
10,989,000
|
13,732,000
|
7,380,000
|
7,412,000
|
|
|
| Loss on Early Extinguishment of Debt Abstract |
|
|
|
|
|
|
|
|
|
|
|
|
| Common stock, par value | $ / shares |
$ 0.001
|
|
|
|
|
|
|
|
|
|
|
|
| Payments on term loans |
$ 192,000,000
|
|
|
|
|
196,625,000
|
900,000
|
98,334,000
|
1,667,000
|
1,467,000
|
|
|
| Loss on extinguishment of debt |
|
|
|
$ 0
|
$ 0
|
(5,442,000)
|
(153,000)
|
(1,813,000)
|
0
|
0
|
|
|
| Selling and store operating expenses and pre-opening expenses |
|
|
|
|
|
|
|
|
|
|
|
|
| Advertising and Pre-opening Expense |
|
|
|
|
|
|
|
|
|
|
|
|
| Advertising expense |
|
|
|
|
|
$ 31,938,000
|
$ 25,404,000
|
$ 33,497,000
|
$ 24,478,000
|
$ 17,359,000
|
|
|
| Interest Rate Cap |
|
|
|
|
|
|
|
|
|
|
|
|
| Derivative Financial Instruments |
|
|
|
|
|
|
|
|
|
|
|
|
| Number of derivatives designated cash flow hedges entered into during period | derivative |
|
2
|
2
|
|
|
|
|
|
|
|
|
|
| Interest Rate Swap |
|
|
|
|
|
|
|
|
|
|
|
|
| Derivative Financial Instruments |
|
|
|
|
|
|
|
|
|
|
|
|
| Number of derivatives designated cash flow hedges entered into during period | derivative |
|
|
|
|
|
|
|
|
|
|
2
|
|
| Minimum |
|
|
|
|
|
|
|
|
|
|
|
|
| Advertising and Pre-opening Expense |
|
|
|
|
|
|
|
|
|
|
|
|
| Period prior to store opening or relocation that pre-opening expenses begin |
|
|
|
|
|
3 months
|
|
3 months
|
|
|
|
|
| Stock-Based Compensation |
|
|
|
|
|
|
|
|
|
|
|
|
| Period of vesting provision |
|
|
|
|
|
3 years
|
|
3 years
|
|
|
|
|
| Maximum |
|
|
|
|
|
|
|
|
|
|
|
|
| Revenue Recognition and Gift Cards |
|
|
|
|
|
|
|
|
|
|
|
|
| Number of days customers may store merchandise |
|
|
|
|
|
14 days
|
|
14 days
|
|
|
|
|
| Advertising and Pre-opening Expense |
|
|
|
|
|
|
|
|
|
|
|
|
| Period prior to store opening or relocation that pre-opening expenses begin |
|
|
|
|
|
6 months
|
|
6 months
|
|
|
|
|
| Stock-Based Compensation |
|
|
|
|
|
|
|
|
|
|
|
|
| Period of vesting provision |
|
|
|
|
|
5 years
|
|
5 years
|
|
|
|
|
| Retained earnings | Accounting Standards Update 2016-09 [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
| Stock-Based Compensation |
|
|
|
|
|
|
|
|
|
|
|
|
| Cumulative effect of adoption |
|
|
|
|
|
|
|
|
|
|
|
$ (148,000)
|
| Additional paid-in capital | Accounting Standards Update 2016-09 [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
| Stock-Based Compensation |
|
|
|
|
|
|
|
|
|
|
|
|
| Cumulative effect of adoption |
|
|
|
|
|
|
|
|
|
|
|
$ 238,000
|
| IPO |
|
|
|
|
|
|
|
|
|
|
|
|
| Loss on Early Extinguishment of Debt Abstract |
|
|
|
|
|
|
|
|
|
|
|
|
| Number of shares issued | shares |
10,147,025
|
|
|
|
|
|
|
|
|
|
|
|
| Net proceeds |
$ 192,000,000
|
|
|
|
|
|
|
|
|
|
|
|