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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 30, 2017
Accounting Policies [Abstract]  
Schedule of Accounts, Notes Receivable and Allowance for Doubtful Accounts
     December 30,      December 31,  
     2017      2016  
     (in thousands)  

Accounts receivable

    $ 61,272      $ 42,045  

Less: Allowance for doubtful accounts

      (964 )       (399 ) 
  

 

 

     

 

 

  

Accounts receivable, net

    $ 60,308      $ 41,646  
  

 

 

     

 

 

  
Information Regarding Warranty Accrual

The following provides information with respect to our warranty accrual.

 

Accrued Warranty

    Beginning
of Period		      Acquired      Charged to
Expense		      Adjustments     Settlements     End of
Period		  
     (in thousands)  

Year ended December 30, 2017

    $ 5,569      $ —        $ 10,675      $ (212 )    $ (10,646 )    $ 5,386  

Year ended December 31, 2016

    $ 4,237      $ 274      $ 11,064      $ 754     $ (10,760 )    $ 5,569  

Year ended January 2, 2016

    $ 3,302      $ —        $ 8,256      $ 332     $ (7,653 )    $ 4,237  
Inventories

 Inventories consist of the following:

 

     December 30,      December 31,  
     2017      2016  
     (in thousands)  

Raw materials

    $ 30,139      $ 24,946  

Work in progress

      2,506        2,521  

Finished goods

      5,171        3,044  
  

 

 

     

 

 

  

Inventories

    $ 37,816      $ 30,511  
  

 

 

     

 

 

  
Schedule of Property, Plant and Equipment

Property, plant and equipment are recorded at cost and depreciated using the straight-line method over the estimated useful lives of the related assets. Depreciable assets are assigned estimated lives as follows:

 

Building and improvements

    5 to 40 years

Leasehold improvements

    Shorter of lease term or estimated useful life

Furniture and equipment

    3 to 10 years

Vehicles

    5 to 10 years

Computer software

    3 years
Calculation of EPS and Reconciliation of Weighted Average Common Shares Used in the Calculation of Basic and Diluted EPS

The table below presents the calculation of basic and diluted earnings per share, including a reconciliation of weighted average common shares:

 

     Year Ended  
     December 30,      December 31,      January 2,  
     2017      2016      2016  
(in thousands, except per share amounts)              

Numerator:

         

Net income

    $ 39,839      $ 23,747      $ 23,552  
  

 

 

     

 

 

     

 

 

  

Denominator:

         

Weighted-average common shares—Basic

      49,522        48,856        48,272  

Add: Dilutive effect of stock compensation plans

      2,206        1,723        2,096  
  

 

 

     

 

 

     

 

 

  

Weighted-average common shares—Diluted

      51,728        50,579        50,368  
  

 

 

     

 

 

     

 

 

  

Net income per common share:

         

Basic

    $ 0.80      $ 0.49      $ 0.49  
  

 

 

     

 

 

     

 

 

  

Diluted

    $ 0.77      $ 0.47      $ 0.47