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Basis of Presentation and Principles of Consolidation (Policies) | 3 Months Ended
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Mar. 31, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Fiscal Period | Fiscal Periods In October 2018, our board of directors approved a change in our annual and quarterly fiscal period ends from the last Friday on or before the calendar year or quarterly month-end to the last day of the calendar year or quarterly month-end. Accordingly, the period end for the first quarters of fiscal 2018 and fiscal 2019 are March 30, 2018 and March 31, 2019, respectively. The number of days in the quarters ended March 30, 2018 and March 31, 2019 were 91 and 90, respectively.
Use of Estimates | Use of Estimates The preparation of the consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual amounts could differ from those estimates. The Company’s most significant estimates and judgments involve revenue recognition with respect to the determination of the costs to complete contracts and transaction price; determination of self-insurance reserves; valuation of the Company’s fair value of common stock; useful lives of property and equipment and intangible assets; calculation of allowance for doubtful accounts; valuation of deferred income tax assets and uncertain tax positions, among others. Please refer to “Note 2 – Summary of Significant Accounting Policies” of Notes to Consolidated Financial Statements included in the Company’s Form S-1/A filed April 29, 2019, for a discussion of the significant estimates and assumptions affecting our consolidated financial statements. Estimates of costs to complete contracts are continually evaluated as work progresses and are revised when necessary. When a change in estimate is determined to have an impact on contract profit, the Company records a positive or negative adjustment to the consolidated statement of income.

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- Definition Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=108774443&loc=d3e5291-111683 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.3A-02(b)) -URI http://asc.fasb.org/extlink&oid=27015204&loc=d3e355033-122828 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.3A-03(b)) -URI http://asc.fasb.org/extlink&oid=27015204&loc=d3e355100-122828 + Details
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