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Income Taxes - Summary of Effective Income Tax Rate Reconciliation (Parenthetical) (Details) - USD ($)
 12 Months Ended
Dec. 22, 2017
Dec. 21, 2017
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Incremental income tax expense [1]     $ 2,984,000
Federal statutory rate 21.00% 35.00%  
[1] On December 22, 2017, the United States enacted tax reform legislation commonly known as the Tax Cuts and Jobs Act (the “Tax Act”), resulting in significant modifications to existing law. As a result of the changes under the Tax Act, the Company recorded incremental income tax expense of $2,984,000 during the year ended December 31, 2017, which consisted primarily of the remeasurement of deferred tax assets and liabilities at the new federal statutory rate of 21%. Prior to the enactment of the Tax Act, deferred tax assets and liabilities were measured at the previous federal statutory rate of 35%.