Cash and Cash Equivalents (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013 Institution	Dec. 31, 2012
Cash and Cash Equivalents (Textual) [Abstract]
Financial institutions to held securities	2
Cash and cash equivalents original maturity dates	three months or less
Bank balances	$ 12.5	$ 9.1

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

No definition available.

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