Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Details Textual)

Revenue Recognition (Details Textual)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Revenue Recognition Textual  
Deferred revenue $ 57,500
Deferred revenue, description We have deferred revenue of $57.5 million related to contractual commitments with customers that the performance obligation will be satisfied over time, which ranges from one to two years.