REVENUE RECOGNITION (Tables)

9 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Summary of Revenue Disaggregation

Disaggregated revenue by primary geographical market and timing of revenue recognition for the Company’s single product line are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
	(In thousands)
Primary geographical markets:
United States	$	150,686	$	54,880	$	328,281	$	148,268
International	29,371		23,122		86,020		75,602
Total	$	180,057	$	78,002	$	414,301	$	223,870
Timing of revenue recognition:
Products delivered at a point in time	$	170,152	$	68,256	$	384,888	$	193,564
Products and services delivered over time	9,905		9,746		29,413		30,306
Total	$	180,057	$	78,002	$	414,301	$	223,870

Summary of Contract Assets and Contract Liabilities, and Changes in Balances from Contracts with Customers

Significant changes in the balances of contract assets (prepaid expenses and other assets) and contract liabilities (deferred revenues) during the period are as follows (in thousands):

Contract Assets
Balance on December 31, 2018	$	47,664
Amount recognized	(10,988		)
Increase	14,705
Balance as of September 30, 2019	$	51,381

Contract Liabilities
Balance on December 31, 2018	$	110,030
Revenue recognized	(29,413		)
Increase due to billings	39,424
Balance as of September 30, 2019	$	120,041

Receivables, and contract assets and contract liabilities from contracts with customers are as follows:

	September 30, 2019		December 31, 2018
	(In thousands)
Receivables	$	133,689	$	78,938
Short-term contract assets (Prepaid expenses and other assets)	14,170		13,516
Long-term contract assets (Other assets)	37,211		34,148
Short-term contract liabilities (Deferred revenues)	34,295		33,119
Long-term contract liabilities (Deferred revenues)	85,746		76,911

Summary of Estimated Revenue Expected to be Recognized in Future Periods

Estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period are as follows:

	September 30, 2019
	(In thousands)
Fiscal year:
2019 (remaining three months)	$	10,045
2020	32,100
2021	25,903
2022	20,881
2023	15,102
Thereafter	16,010
Total	$	120,041