Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Details Textual)

Revenue Recognition (Details Textual)
6 Months Ended
Jun. 30, 2019
Revenue Recognition (Textual)  
Deferred revenue, description We have deferred revenue of $60.6 million related to contractual commitments with customers where the performance obligation will be satisfied over time, which ranges from one to two years.