Employee Retirement Plan - Additional Information (Details) (USD $)	12 Months Ended
Dec. 31, 2014 Age	Dec. 31, 2013
Compensation And Retirement Disclosure [Abstract]
Employers contributions to defined contribution plan	$ 0	$ 0
Employees eligibility age to participate in retirement plan	21

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

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