Quarterly report pursuant to Section 13 or 15(d)

Entity Level Information - Composition of Revenues (Details)

v3.19.3
Entity Level Information - Composition of Revenues (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Entity Wide Information Revenue From External Customer [Line Items]        
Total revenues $ 28,850 $ 39,498 $ 99,081 $ 89,138
Product Sales        
Entity Wide Information Revenue From External Customer [Line Items]        
Total revenues 28,773 38,892 98,714 86,876
Services        
Entity Wide Information Revenue From External Customer [Line Items]        
Total revenues $ 77 $ 606 $ 367 $ 2,262