Stockholders' Agreement (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Repurchase Agreement Counterparty [Line Items]
Proposed offering proceeds	$ 10
Proposed offering proceeds from issuance of common stock if able to register on form S-3	$ 5
DLJ Merchant Banking Party
Repurchase Agreement Counterparty [Line Items]
Percentage of outstanding shares of common stock	10.00%

The cash inflow from the additional capital contribution to the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration