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Secured Credit Facility and Other Debt - Narrative (Details)
3 Months Ended
Apr. 03, 2020
USD ($)
Apr. 03, 2019
USD ($)
Apr. 03, 2017
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Debt Instrument [Line Items]            
Amortization of debt issuance costs       $ 500,000 $ 200,000  
Notes payable for transportation and construction equipment and other            
Debt Instrument [Line Items]            
Notes payable, noncurrent       $ 1,500,000   $ 1,600,000
Notes payable for transportation and construction equipment and other | Minimum            
Debt Instrument [Line Items]            
Debt instrument, term       3 years    
Debt instrument, interest rate, stated percentage       3.15%    
Notes payable for transportation and construction equipment and other | Maximum            
Debt Instrument [Line Items]            
Debt instrument, term       5 years    
Debt instrument, interest rate, stated percentage       7.14%    
Warrants to the Lenders Under the Loan Agreement            
Debt Instrument [Line Items]            
Warrants and rights outstanding       $ 3,500,000    
Notes and deferred payments to sellers, Tealstone acquisition            
Debt Instrument [Line Items]            
Promissory notes issued to the sellers     $ 5,000,000      
Cash payments to the seller     $ 55,000,000      
Fair value inputs, discount rate     12.00%      
Notes and deferred payments to sellers     $ 11,600,000      
Accretion expense       $ 300,000    
Notes and deferred payments to sellers, Tealstone acquisition | Scenario, Forecast            
Debt Instrument [Line Items]            
Cash payments to the seller $ 7,500,000 $ 2,426,000        
Term loan | Senior secured term loans | Loan and security agreement            
Debt Instrument [Line Items]            
Debt instrument face amount     $ 85,000,000      
Loan prepayment offer required to make quarterly, percentage     75.00%      
Debt instrument, financial covenants, maximum ratio of secured indebtedness to EBITDA, period one     3.10      
Debt Instrument, financial covenants, maximum ratio of secured indebtedness to EBITDA, period two     1.80      
Debt Instrument, financial covenants, minimum daily cash collateral, period two     $ 15,000,000      
Debt instrument, financial covenants, minimum rolling four quarter gross margin in contract backlog, period one     60,000,000      
Debt Instrument, financial covenants, minimum rolling four quarter gross margin in contract backlog, period two     70,000,000      
Debt instrument, financial covenants, maximum incurrence of net capital expenditures during each of four consecutive fiscal quarters     15,000,000      
Debt instrument, financial covenants, minimum bonding capacity     1,000,000,000      
Debt instrument, financial covenants, minimum EBITDA during each four consecutive fiscal quarters     12,000,000      
Debt issuance costs, net     $ 10,400,000      
Debt instrument, term     5 years      
Term loan | Senior secured term loans | Loan and security agreement | London Interbank Offered Rate (LIBOR)            
Debt Instrument [Line Items]            
Debt instrument, basis spread on variable rate     8.75%