Summary of Significant Accounting Policies - Additional Information (Details)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2017	Sep. 30, 2017 Customer Supplier	Oct. 01, 2016 Customer Supplier	Sep. 30, 2017 Customer Supplier	Oct. 01, 2016 Customer Supplier	Dec. 31, 2016 Customer
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	0	0	0
Customer and supplier accounted percentage of total revenues, accounts receivable and purchases		10.00%	10.00%	10.00%	10.00%
Accounts Receivable | Customer Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customer accounted for total revenues and net accounts receivable		1		1		0
Customer and supplier accounted percentage of total revenues, accounts receivable and purchases				12.00%		10.00%
Purchases | Supplier Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of supplier accounted for total purchases | Supplier		1	0	0	0
Customer and supplier accounted percentage of total revenues, accounts receivable and purchases		14.00%	10.00%	10.00%	10.00%