Quarterly report pursuant to Section 13 or 15(d)

Revenue - Narrative (Details)

v3.19.3
Revenue - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]          
Increase (decrease) in contract with customer liability     $ 10,653    
Recognized deferred revenue $ 4,434 $ 3,250 21,022 $ 16,503  
Deferred sales incentive compensation 9,431   9,431   $ 7,014
Amortization expense for the deferred sales incentive compensation $ 1,099 $ 552 $ 2,503 $ 1,570