Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2017	Apr. 01, 2017 USD ($) Customer	Apr. 02, 2016 Customer	Dec. 31, 2016 Customer
ASU No. 2016-09
Disclosure Summary Of Significant Accounting Policies [Line Items]
Increase in deferred tax assets | $		$ 1.4
IQ 532/577 Laser Consoles
Disclosure Summary Of Significant Accounting Policies [Line Items]
Products warranty period	5 years
Minimum
Disclosure Summary Of Significant Accounting Policies [Line Items]
Products warranty period		1 year
Maximum
Disclosure Summary Of Significant Accounting Policies [Line Items]
Products warranty period		2 years
Revenue, Total | Customer Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customer accounted for total revenues and net accounts receivable		0	1
Customer accounted percentage of total revenues		10.00%	15.00%
Accounts Receivable | Customer Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customer accounted for total revenues and net accounts receivable		0	1
Customer accounted percentage of total revenues		10.00%	19.00%
Accounts Receivable | Credit Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customer accounted for total revenues and net accounts receivable		0		0