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Intangible Assets, net (Details Textual) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2012
Referral Relationship [Member]
Dec. 31, 2011
Referral Relationship [Member]
Dec. 31, 2012
Referral Relationship [Member]
Minimum [Member]
Dec. 31, 2012
Referral Relationship [Member]
Maximum [Member]
Dec. 31, 2012
Non Compete Agreements [Member]
Dec. 31, 2011
Non Compete Agreements [Member]
Dec. 31, 2012
Non Compete Agreements [Member]
Minimum [Member]
Dec. 31, 2012
Non Compete Agreements [Member]
Maximum [Member]
Intangible Assets, Net (Textual) [Abstract]                
Accumulated amortization $ 1,217 $ 784     $ 1,848 $ 1,443    
Estimated useful life     6 years 16 years     5 years 6 years