Subsidiary Bankruptcy and Settlement Agreement - Additional Information (Details) (USD $)	1 Months Ended	12 Months Ended
Sep. 26, 2013	Dec. 31, 2014	Dec. 31, 2013
Subsidiary Bankruptcy And Settlement Agreement [Line Items]
Payments for Legal Settlements	$ 200,000us-gaap_PaymentsForLegalSettlements	$ 0us-gaap_PaymentsForLegalSettlements	$ 200,000us-gaap_PaymentsForLegalSettlements

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

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