REVENUE Deferred Revenue Activity (Tables)

9 Months Ended

Sep. 30, 2018

Deferred Revenue Arrangement [Line Items]

Deferred Revenue, by Arrangement, Disclosure [Table Text Block]

	September 30, 2018
Product	$	6,480
Subscription	943
Support Contracts	56,903
Implied PCS	17,572
Professional services, training and other	6,326
Deferred revenue at September 30, 2018	$	88,224

Deferred Revenue Disclosure [Text Block]

Deferred Revenue

Deferred revenue activity for the nine months endedSeptember 30, 2018 was as follows (in thousands):

	September 30, 2018
Deferred revenue at January 1, 2018	$	97,923
Billings deferred	59,185
Recognition of prior deferred revenue	(68,884		)
Deferred revenue at September 30, 2018	$	88,224

A summary of the significant performance obligations included in deferred revenue as of September 30, 2018 is as follows (in thousands):

	September 30, 2018
Product	$	6,480
Subscription	943
Support Contracts	56,903
Implied PCS	17,572
Professional services, training and other	6,326
Deferred revenue at September 30, 2018	$	88,224

We expect deferred revenue recorded as of September 30, 2018 will be recorded as revenue within the next 12 months, except for Implied PCS performance obligations and long-term support agreements. We expect $6 million, $5 million, $3 million, and $1 million of Implied PCS deferred revenue recorded as of September 30, 2018 will be recognized as revenue for the years ended December 31, 2019, 2020, 2021, and 2022, respectively. We expect $1 million of long-term support deferred revenue recorded as of September 30, 2018 will be recognized for each of the years ended December 31, 2019 and 2020 respectively.