In millions, except per share items | Dec-25-17 | Dec-26-16 | Dec-28-15 | Dec-29-14 | Dec-30-13 | Dec-31-12 | Dec-26-11 |
| 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | S-1/A |
Revenue: | | | | | | | |
Restaurant sales | 313.9 | 275.8 | 226.4 | 171.3 | 115.7 | 79.0 | 49.2 |
Royalty fees | 0.2 | 0.2 | 0.2 | 0.5 | 0.6 | 0.8 | 0.1 |
Total revenue | 314.1 | 276.0 | 226.6 | 171.7 | 116.4 | 79.7 | 50.2 |
Total revenue growth | 13.8% | 21.8% | 31.9% | 47.6% | 46.0% | 58.9% | |
Operating expenses: | | | | | | | |
Cost of sales | 91.8 | 83.5 | 70.5 | 56.8 | 38.1 | 25.8 | 15.8 |
Labor | 95.6 | 81.1 | 64.8 | 48.3 | 32.8 | 21.6 | 13.4 |
Store operating expenses | 68.4 | 55.9 | 43.2 | 31.9 | 21.8 | 14.6 | 9.6 |
General and administrative expenses | 33.4 | 30.4 | 26.7 | 26.7 | 13.2 | 9.0 | 6.4 |
Depreciation | 18.4 | 14.5 | 11.4 | 8.9 | 5.9 | 3.8 | 2.8 |
Amortization | 1.5 | 1.6 | 1.6 | 1.6 | 1.6 | 1.1 | 0.6 |
Pre-opening costs | 2.3 | 2.2 | 2.6 | 2.1 | 1.9 | 0.9 | 0.8 |
Loss from disposal of equipment | 1.4 | 0.4 | 0.3 | 0.1 | 0.2 | 0.2 | 0.0 |
Total operating expenses | 312.9 | 269.5 | 221.4 | 176.5 | 115.4 | 77.0 | 49.4 |
Income (loss) from operations | 1.2 | 6.4 | 5.2 | -4.8 | 1.0 | 2.7 | 0.8 |
Operating margin | 0.4% | 2.3% | 2.3% | -2.8% | 0.8% | 3.4% | 1.6% |
|
Other income and expenses: | | | | | | | |
Interest expense, net | -4.6 | -3.8 | -3.3 | -3.5 | -4.0 | -2.3 | -1.2 |
Other income | -0.1 | -0.1 | -0.1 | | | -2.3 | -0.7 |
Total other income and expenses | 4.5 | 3.8 | 3.2 | -4.5 | -4.0 | -2.3 | -0.7 |
Income (loss) before provision for income taxes | -3.3 | 2.7 | 2.0 | -9.3 | -3.1 | 0.4 | 0.1 |
Provision (benefit) for income taxes | -1.3 | 0.9 | 0.8 | 0.7 | 0.7 | 0.6 | 0.1 |
Net income (loss) | -2.0 | 1.8 | 1.1 | -10.0 | -3.7 | -0.3 | 0.0 |
|
Earnings (loss) per share: | | | | | | | |
Basic (USD per share) | ($0.10) | $0.09 | $0.06 | ($0.58) | ($0.30) | ($0.02) | |
Diluted (USD per share) | ($0.10) | $0.09 | $0.06 | ($0.58) | ($0.30) | ($0.02) | |
|
Weighted average shares of common stock outstanding: | | | | | | | |
Basic (in shares) | 19.5 | 19.4 | 19.3 | 17.4 | 12.6 | 12.6 | 12.6 |
Diluted (in shares) | 19.5 | 19.6 | 19.6 | 17.4 | 12.6 | 12.6 | 12.6 |