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Business Acquisitions (Details) - USD ($) $ in Thousands | Jan. 31, 2017 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Assets Acquired: |  |  |  |
Goodwill |  | $ 88,208 | $ 89,000 | $ 74,764
C1 Consulting LLC |  |  |  |
Business Acquisitions |  |  |  |
Maximum period for additional purchase consideration to be paid | 4 years |  |  |
Assets Acquired: |  |  |  |
Accounts receivable and unbilled receivables | $ 2,306 |  |  |
Other current assets | 10 |  |  |
Total current assets | 2,316 |  |  |
Property and equipment | 206 |  |  |
Other non-current assets | 106 |  |  |
Intangible assets | 8,500 |  |  |
Goodwill | 12,994 |  |  |
Total assets acquired | 24,122 |  |  |
Liabilities Assumed: |  |  |  |
Deferred revenue | 1,950 |  |  |
Accrued expenses and other current liabilities | 652 |  |  |
Total current liabilities | 2,602 |  |  |
Net assets acquired | $ 21,520 |  |  |
C1 Consulting LLC | Selling, general and administrative expenses |  |  |  |
Liabilities Assumed: |  |  |  |
Transaction related costs |  |  | $ 900 |
C1 Consulting LLC | Non-compete agreements |  |  |  |
Liabilities Assumed: |  |  |  |
Estimated useful life (in years) | 5 years |  |  |
C1 Consulting LLC | Customer relationships |  |  |  |
Liabilities Assumed: |  |  |  |
Estimated useful life (in years) | 10 years |  |  |

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