Revenue Recognition (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Revenue Recognition [Line Items]
Unbilled revenue	$ 224,000	$ 224,000	$ 457,000
Increase (decrease) in Medicare cap liability	(873,000)	(873,000)
One Program Projected Measurement Period Liability [Member]
Revenue Recognition [Line Items]
Increase (decrease) in Medicare cap liability		$ 4,000,000