XML 45 R40.htm IDEA: XBRL DOCUMENT v3.19.3
NET SALES - Deferred revenue (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Dec. 31, 2017
Accrued expenses and other liabilities        
Disaggregation of revenue:        
Deferred revenue $ 320 $ 496 $ 397 $ 864