Cash and Cash Equivalents (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Presentation of Cash and Cash Equivalents
Cost	$ 1,553	$ 10,869
Gross Unrealized Losses	0
Gross Unrealized Gains	0
Fair Value	1,553	10,869
Cash [Member]
Presentation of Cash and Cash Equivalents
Cost	1,504	5,621
Gross Unrealized Losses	0
Gross Unrealized Gains	0
Fair Value	1,504	5,621
Money Market Funds [Member]
Presentation of Cash and Cash Equivalents
Cost	49	5,248
Gross Unrealized Losses	0
Gross Unrealized Gains	0
Fair Value	$ 49	$ 5,248