Quarterly report pursuant to Section 13 or 15(d)

Accrued Warranty - Schedule Product Warranty Accrual Included in Accrued Expenses (Details)

v3.10.0.1
Accrued Warranty - Schedule Product Warranty Accrual Included in Accrued Expenses (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Product Warranties Disclosures [Abstract]    
Balanced at beginning of period, Accrued warranty $ 87 $ 97
Increase in warranty accrual 60 198
Claims satisfied (97) (208)
Balanced at ending of period, Accrued warranty $ 50 $ 87