Summary of Significant Accounting Policies - Additional Information (Detail)
shares in Thousands |
12 Months Ended |
|
Dec. 31, 2016
USD ($)
shares
|
Jan. 02, 2016
USD ($)
shares
|
Jan. 03, 2015
USD ($)
Segment
shares
|
| Business Description And Accounting Policies [Line Items] |
|
|
|
| Number of operating segments | Segment |
|
|
1
|
| Shipping and handling costs |
$ 18,300,000
|
$ 15,400,000
|
$ 13,000,000
|
| Advertising Expense |
200,000
|
300,000
|
700,000
|
| Research and development costs |
$ 1,700,000
|
$ 2,000,000
|
1,800,000
|
| Original maturity date of cash and cash equivalents |
Three months or less
|
|
|
| Warranty expense, average rate |
2.41%
|
2.12%
|
|
| Portion of warranty expense related to issuance of product |
$ 6,800,000
|
$ 4,800,000
|
3,100,000
|
| Servicing warranty claims |
5,000,000
|
3,800,000
|
2,900,000
|
| Capitalization of software |
16,600,000
|
16,300,000
|
|
| Accumulated depreciation of capitalized software |
15,400,000
|
14,500,000
|
|
| Amortization expense for capitalized software |
900,000
|
1,100,000
|
$ 500,000
|
| The amount of insured limit exceeds by the balance |
37,500,000
|
$ 61,000,000
|
|
| Material liability for unrecognized tax benefits |
$ 0
|
|
|
| Weighted average shares outstanding excluding underlying securities | shares |
20
|
66
|
16
|
| Minimum [Member] |
|
|
|
| Business Description And Accounting Policies [Line Items] |
|
|
|
| Warranty periods |
1 year
|
|
|
| Warranty period of the majority of products sold |
1 year
|
|
|
| Maximum [Member] |
|
|
|
| Business Description And Accounting Policies [Line Items] |
|
|
|
| Warranty periods |
10 years
|
|
|
| Warranty period of the majority of products sold |
3 years
|
|
|