Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
Accrued Warranty - Schedule Product Warranty Accrual Included in Accrued Expenses (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Product Warranties Disclosures [Abstract]    
Balance at beginning of period, Accrued warranty $ 112 $ 87
Increase in warranty accrual 751 287
Claims satisfied (344) (262)
Balance at ending of period, Accrued warranty $ 519 $ 112