Deferred Revenue

6 Months Ended

Jun. 30, 2016

Revenue Recognition [Abstract]

Deferred Revenue

Deferred Revenue — Deferred revenue at June 30, 2016 was $28.2 million for the current portion and $0.7 million for the non-current portion. Deferred revenue at December 31, 2015 was $27.0 million for the current portion and $0.7 million for the non-current portion. Deferred revenue primarily consists of unearned maintenance, software license and professional services revenue. Unearned maintenance revenue represents a contractual liability to provide maintenance support over a defined period of time for which payment has generally been received. Unearned software license and professional services revenue represents a contractual liability to provide professional services more substantive than post contract support for which not all payments have been received. We will recognize revenue when the service or software is provided or the delivery otherwise meets our revenue recognition criteria.