Employee Benefit Plan (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Employee Benefit Plan (Textual)
Maximum percentage of employee's contribution	4.00%
Employers contribution	$ 11,023	$ 11,505

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration