The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

No definition available.

Name:	us-gaap_CashFDICInsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Concentrations of Credit Risk (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2011 Maximum	Sep. 30, 2012 Cash and cash equivalents Credit concentration	Sep. 30, 2012 Cash and cash equivalents Credit concentration Maximum
Concentrations of Credit Risk
Deposits insured by the Federal Deposit Corporation		$ 250,000		$ 250,000
Uninsured bank deposit balance	$ 4,700,000		$ 3,500,000