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SCHEDULE I: CONDENSED FINANCIAL INFORMATION OF REGISTRANT - STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 03, 2015 | Dec. 28, 2016 | Sep. 28, 2016 | Jun. 29, 2016 | Mar. 30, 2016 | Dec. 30, 2015 | Sep. 30, 2015 | Jul. 01, 2015 | Apr. 01, 2015 | Dec. 30, 2015 | Dec. 28, 2016 | Dec. 30, 2015 | Dec. 31, 2014
OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ (13,049) | $ 5,457 | $ 6,789 | $ 6,549 | $ 3,351 | $ 3,046 | $ 6,193 | $ 5,145 | $ (11,260) | $ 16,173 | $ 22,146 | $ 3,124 | $ 2,118
Deferred income taxes |  |  |  |  |  |  |  |  |  |  | (523) | (734) | (93)
Other Noncash Income (Expense) |  |  |  |  |  |  |  |  |  |  | (688) | 0 | 0
Increase (Decrease) in Accounts Receivable |  |  |  |  |  |  |  |  |  |  | (2,974) | (775) | 1,751
Increase (Decrease) in Prepaid Expense and Other Assets |  |  |  |  |  |  |  |  |  |  | 756 | 958 | 1,168
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Equity-based compensation |  |  |  |  |  |  |  |  |  |  | 5,354 | 16,681 | 165
Changes in operating assets and liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued expenses |  |  |  |  |  |  |  |  |  |  | 5,560 | 2,548 | 3,349
Other current liabilities |  |  |  |  |  |  |  |  |  |  | 2,130 | 257 | 420
INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |  |
NET CASH USED IN INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  | (114,761) | (34,514) | (28,515)
FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of Class A common stock sold in initial public offering, net of underwriting discounts and commissions |  |  |  |  |  |  |  |  |  |  | 0 | 109,262 | 0
Proceeds from issuance of Class B common stock |  |  |  |  |  |  |  |  |  |  | 0 | 30 | 0
Proceeds from Stock Options Exercised |  |  |  |  |  |  |  |  |  |  | 3,194 | 0 | 0
NET CASH PROVIDED BY FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  | 1,234 | 61,428 | 4,532
NET CASH PROVIDED BY OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  | 54,285 | 41,258 | 13,584
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  | (59,242) | 68,172 | (10,399)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD |  |  |  |  | 70,849 |  |  |  |  |  | 70,849 |  | 2,677
CASH AND CASH EQUIVALENTS AT END OF PERIOD |  | 11,607 |  |  |  | 70,849 |  |  |  | 70,849 | 11,607 | 70,849 |
Non-cash financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Establishment of liabilities under tax receivable agreement |  |  |  |  |  |  |  |  |  |  | 100,063 | 173,090 | 0
Class A Common Stock | IPO And Organizational Transaction |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Class A common stock issued |  |  |  |  |  |  |  |  |  |  | 0 | 6 | 0
Class A Common Stock | USC Merger |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Class A common stock issued |  |  |  |  |  |  |  |  |  |  | 0 | 2 | 0
Class A Common Stock | Secondary Offering and Redemption of Units |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Class A common stock issued |  |  |  |  |  |  |  |  |  |  | 5 | 6 | 0
Class B Common Stock | IPO And Organizational Transaction |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of Class B common stock |  |  |  |  |  |  |  |  |  |  |  | (6) | 0
Class B Common Stock | USC Merger |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of Class B common stock |  |  |  |  |  |  |  |  |  |  | 0 | (2) | 0
Class B Common Stock | Secondary Offering and Redemption of Units |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of Class B common stock |  |  |  |  |  |  |  |  |  |  | (5) | (6) | 0
Parent Company |  |  |  |  |  |  |  |  |  |  |  |  |
OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  |  | 12,446 | 4,273 | 0
Non-cash reimbursement revenue treated as investment [Line Items] |  |  |  |  |  |  |  |  |  |  | (189) | 0 | 0
Deferred income taxes |  |  |  |  |  |  |  |  |  |  | (462) | (551) | 0
Other Noncash Income (Expense) |  |  |  |  |  |  |  |  |  |  | (688) | 0 | 0
Increase (Decrease) in Accounts Receivable |  |  |  |  |  |  |  |  |  |  | 2 | 0 | 0
Increase (Decrease) in Prepaid Expense and Other Assets |  |  |  |  |  |  |  |  |  |  | 1 | 0 | 0
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Equity income from affiliates |  |  |  |  |  |  |  |  |  |  | (16,982) | (6,906) | 0
Equity-based compensation |  |  |  |  |  |  |  |  |  |  | 189 | 330 | 0
Changes in operating assets and liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |
Due from SSE Holdings |  |  |  |  |  |  |  |  |  |  | 214 | 4 | 0
Accrued expenses |  |  |  |  |  |  |  |  |  |  | (11) | 58 | 0
Other current liabilities |  |  |  |  |  |  |  |  |  |  | 17 | 0 | 0
Income taxes payable |  |  |  |  |  |  |  |  |  |  | 5,023 | 3,184 | 0
INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases of LLC Interests from SSE Holdings |  |  |  |  |  |  |  |  |  |  | (4,559) | (112,298) | 0
Return of investment in SSE Holdings [Line Items] |  |  |  |  |  |  |  |  |  |  | 2,694 | 0 | 0
NET CASH USED IN INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  | (1,865) | (112,298) | 0
FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of Class A common stock sold in initial public offering, net of underwriting discounts and commissions |  |  |  |  |  |  |  |  |  |  | 0 | 112,298 | 0
Proceeds from issuance of Class A common stock to SSE Holdings upon settlement of stock option exercises [Line Items] |  |  |  |  |  |  |  |  |  |  | 2,489 | 0 | 0
Proceeds from issuance of Class B common stock |  |  |  |  |  |  |  |  |  |  | 0 | 30 | 0
Proceeds from Stock Options Exercised |  |  |  |  |  |  |  |  |  |  | 3,185 | 0 | 0
NET CASH PROVIDED BY FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  | 5,674 | 112,328 | 0
NET CASH PROVIDED BY OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  | (446) | 392 | 0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  | 3,363 | 422 | 0
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD | $ 0 |  |  |  | $ 422 |  |  |  | $ 0 |  | 422 | 0 | 0
CASH AND CASH EQUIVALENTS AT END OF PERIOD |  | $ 3,785 |  |  |  | $ 422 |  |  |  | $ 422 | 3,785 | 422 | 0
Parent Company | Class A Common Stock | IPO And Organizational Transaction |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Class A common stock issued |  |  |  |  |  |  |  |  |  |  | 0 | 6 | 0
Parent Company | Class A Common Stock | USC Merger |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Class A common stock issued |  |  |  |  |  |  |  |  |  |  | 0 | 2 | 0
Parent Company | Class A Common Stock | Secondary Offering and Redemption of Units |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Class A common stock issued |  |  |  |  |  |  |  |  |  |  | 18,944 | 19,933 | 0
Parent Company | Class B Common Stock | IPO And Organizational Transaction |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of Class B common stock |  |  |  |  |  |  |  |  |  |  | 0 | (6) | 0
Parent Company | Class B Common Stock | USC Merger |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of Class B common stock |  |  |  |  |  |  |  |  |  |  | $ 0 | (2) | 0
Parent Company | Class B Common Stock | Secondary Offering and Redemption of Units |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of Class B common stock |  |  |  |  |  |  |  |  |  |  |  | $ (6) | $ 0

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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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- Definition Amount of income (expense) included in net income that results in no cash inflow (outflow), classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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