Quarterly report pursuant to Section 13 or 15(d)

Accrued Warranty (Details)

v3.10.0.1
Accrued Warranty (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Product Warranties Disclosures [Abstract]        
Warranty expense $ 30 $ 30 $ 100 $ 100