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Summary of Significant Accounting Policies - Additional Information (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2017 | Dec. 29, 2018 USD ($) Customer | Dec. 30, 2017 USD ($) Customer | Dec. 30, 2018 USD ($)
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Provision for sales returns |  | $ 277,000 | $ 570,000 |
Gross value of demos and loaners |  | 3,100,000 | 2,400,000 |
Accumulated amortization on inventory demos and loaners |  | $ 1,400,000 | 900,000 |
Estimated useful life of demos and loaners |  | 4 years |  |
Estimated useful lives of the assets |  | 3 years |  |
Extended product warranty period |  | 1 year |  |
Extended warranty, period to determine nature of sale |  | 60 days |  |
Products warranty period |  | 2 years |  |
Advertising and promotion costs |  | $ 500,000 | 200,000 |
Accrued interest and penalty incurred |  | $ 0 | $ 0 |
Subsequent Event |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Right-of-use assets |  |  |  | $ 4,000,000
Lease liabilities |  |  |  | $ 4,500,000
Revenue, Total | Customer Concentration Risk |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of customers | Customer |  | 0 | 0 |
Accounts Receivable | Credit Concentration Risk |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of customers | Customer |  | 0 | 0 |
IQ 532/577 Laser Consoles |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Products warranty period | 5 years |  |  |
Shipping and Handling |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Shipping and handling costs |  | $ 300,000 | $ 300,000 |
Royalty Agreements |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of customers | Customer |  | 2 |  |

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