Employee Benefit Plan (Details) - USD ($)	12 Months Ended
Dec. 31, 2015	Feb. 28, 2015	Feb. 28, 2014
Compensation and Retirement Disclosure [Abstract]
Employer matching contribution, percentage	25.00%
Employer matching contribution maximum amount	$ 500
Employer matching contribution	$ 205,000	$ 198,000	$ 200,000

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