Segment and Geographical Information - Schedule of Revenues Attributed to Geographic Location of Customer (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]
Total consolidated revenues	$ 44,761	$ 48,647
United States [Member] \| Reportable Geographical Components [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total consolidated revenues	29,086	30,467
International [Member] \| Reportable Geographical Components [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total consolidated revenues	$ 15,675	$ 18,180

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration