Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Details Textual)

Revenue Recognition (Details Textual)
$ in Thousands
6 Months Ended
Jun. 30, 2018
USD ($)
Revenue Recognition (Textual)  
Deferred revenue, description We have deferred revenue of $55.1 million related to contractual commitments with customers that the performance obligation will be satisfied over time, which ranges from one to two years.
Deferred revenue $ 55,100