Subsequent Events - Additional Information (Details) - TruFocus LIO Premiere™ $ in Millions		3 Months Ended
	Feb. 23, 2018 Unit Event	Dec. 30, 2017 USD ($)
Subsequent Event [Line Items]
Estimated decrease in revenue due to increase in sales return allowance		$ 0.8
Cost of sales increased related to inventory write-down,replacement and other associated warranty costs		$ 1.3
Subsequent Event
Subsequent Event [Line Items]
Number of premiere product units at customer sites | Unit	104
Adverse events occured during procedure | Event	3
Recalled products manufactured from the date	May 26, 2017
Recalled products manufactured end date	Nov. 06, 2017
Recalled products distributed from the date	Jun. 05, 2017
Recalled products distributed end date	Jan. 29, 2018