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