Reverse Stock Split (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	0 Months Ended	6 Months Ended			0 Months Ended
	Sep. 04, 2012	Jun. 30, 2013	Dec. 31, 2012	Sep. 04, 2012 Maximum	Jun. 11, 2012 Scenario 1	Jun. 11, 2012 Scenario 2	Jun. 11, 2012 Scenario 3	Jun. 11, 2012 Scenario 4	Jun. 11, 2012 Scenario 5	Jun. 30, 2013 Immediately prior to reverse split	Jun. 30, 2013 Immediately after reverse split
Class of Stock [Line Items]
Reverse stock split conversion ratio	0.3333				0.5000	0.4000	0.3333	0.2857	0.2500
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01							$ 0.01	$ 0.01
Common Stock and Additional Paid-In Capital adjustment to reflect reverse split		$ 114,000
Aggregate amount paid to stockholders				$ 1,000
Common Stock, shares outstanding		5,711	5,706