Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014 USD ($)
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Number of operating segments \| Segment			1
Selling and marketing expense
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Related party sales and marketing expense	$ 6,253	$ 4,507	$ 10,171	$ 7,843
Restatement adjustment \| Related party sales and marketing expenses \| Selling and marketing expense
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Related party sales and marketing expense		$ 2,300		$ 3,200