3.	Segment Reporting and Significant Concentration

Segment Information. We have evaluated how our chief operating decision maker has organized our company for purposes of making operating decisions and assessing performance, and have concluded that as of December 31, 2017, we have one reportable segment.

Products and Services. Our products and services help companies with complex transaction-centric business models manage the opportunities and challenges associated with accurately capturing, managing, generating, and optimizing the revenue associated with the immense volumes of customer communications and then manage the intricate nature of those customer relationships. Our core billing and customer care platform, Advanced Convergent Platform (“ACP”), is a pre-integrated cloud-based platform. We generate a substantial percentage of our revenues by providing our ACP cloud-based and customer communications management solutions, and related software products (e.g., Advanced Customer Service Representative, Workforce Express, etc.) to the North American cable and satellite markets. Our next-generation solution, Ascendon, a SaaS cloud-based platform, provides a trusted path to digital transformation. Additionally, we license certain software products (e.g., WBMS, TSM, and Singleview) and provide our professional services to implement, configure, and maintain these software products, and allow clients to effectively roll out new products as well as attract and retain customers. We also provide our software solutions under managed services arrangements, where we assume long-term responsibility for delivering our solutions and related operations under a defined scope and specified service levels.

Geographic Regions. For 2017, 2016, and 2015, 85%, 86%, and 84%, respectively, of our revenues were attributable to our operations in the Americas. We use the location of the client as the basis of attributing revenues to individual regions.

Financial information relating to our operations by geographic region is as follows (in thousands):

Total Revenues:

	2017		2016		2015
Americas (principally the U.S.)	$	669,712	$	652,376	$	634,389
Europe, Middle East and Africa (principally Europe)		72,120		69,425		78,711
Asia Pacific		47,750		39,157		39,420
Total revenues	$	789,582	$	760,958	$	752,520

Property and Equipment:	As of December 31,
	2017		2016
Americas (principally the U.S.)	$	40,286	$	28,003
Europe, Middle East and Africa (principally Europe)		2,392		2,749
Asia Pacific		1,973		2,364
Total property and equipment	$	44,651	$	33,116

Significant Clients and Industry Concentration. A large percentage of our historical revenues have been generated from our largest clients, which are Comcast Corporation (“Comcast”), Charter Communications, Inc. (“Charter”), and DISH Network Corporation (“DISH”). Due to Charter’s acquisition of Time Warner Cable, Inc. (“Time Warner”) in May 2016, in order to provide a consistent basis of comparison, Charter and Time Warner revenues and accounts receivable balances are combined in the following tables for all periods prior to the acquisition without adjustment.

Revenues from these clients represented the following percentages of our total revenues for the following years:

	2017			2016			2015
Comcast		28	%		26	%		24	%
Charter		22	%		21	%		21	%
DISH		11	%		13	%		14	%

As of December 31, 2017 and 2016, the percentage of net billed accounts receivable balances attributable to these clients were as follows:

	As of December 31,
	2017			2016
Comcast		26	%		25	%
Charter		32	%		24	%
DISH		8	%		10	%

We expect to continue to generate a significant percentage of our future revenues from our largest clients, mentioned above. There are inherent risks whenever a large percentage of total revenues are concentrated with a limited number of clients. Should a significant client: (i) terminate or fail to renew their contracts with us, in whole or in part for any reason; (ii) significantly reduce the number of customer accounts processed on our solutions, the price paid for our services, or the scope of services that we provide; or (iii) experience significant financial or operating difficulties, it could have a material adverse effect on our financial position and results of operations.