Research And Development (Details) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Research And Development
Deferred research and development costs	$ 0		$ 0
Amortization expense	$ 0	$ 0

Amount of other deferred costs charged against earnings in the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_OtherDeferredCostAmortizationExpense
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration