Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Deferred Revenue Activity (Details)

v3.10.0.1
Revenue Recognition - Deferred Revenue Activity (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Change In Contract With Customer, Liability Rollforward [Roll Forward]  
Beginning balance $ 1,919
Deferral of revenue 2,230
Recognition of deferred revenue (1,552)
Ending balance $ 2,597