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INTANGIBLES AND OTHER ASSETS Goodwill and Intangible Assets Disclosure (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Acquired Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible assets, cost $ 9,406,000 $ 9,403,000 $ 9,406,000 $ 9,403,000
Finite-lived intangible assets, accumulated amortization 2,009,000 1,437,000 2,009,000 1,437,000
Finite-lived intangible assets, net book value 7,397,000 7,966,000 7,397,000 7,966,000
Amortization expense 300,000 300,000 600,000 600,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]        
Amortization expense, 2012 1,200,000   1,200,000  
Amortization expense, 2013 1,200,000   1,200,000  
Amortization expense, 2014 1,200,000   1,200,000  
Amortization expense, 2015 1,200,000   1,200,000  
Amortization expense, 2016 1,200,000   1,200,000  
Amortization expense, 2017 1,200,000   1,200,000  
Intangibles - third party payor relationships
        
Acquired Finite-Lived Intangible Assets [Line Items]        
Indefinite-lived intangible assets 367,000 367,000 367,000 367,000
Intangibles - acquired technology
        
Acquired Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible assets, cost 6,535,000 6,535,000 6,535,000 6,535,000
Finite-lived intangible assets, accumulated amortization 1,366,000 911,000 1,366,000 911,000
Finite-lived intangible assets, net book value 5,169,000 5,624,000 5,169,000 5,624,000
Intangibles - acquired technology | Minimum
        
Acquired Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible asset, useful life     7 years  
Intangibles - acquired technology | Maximum
        
Acquired Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible asset, useful life     8 years  
Intangibles - assay royalties
        
Acquired Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible assets, cost 1,434,000 1,434,000 1,434,000 1,434,000
Finite-lived intangible assets, accumulated amortization 307,000 205,000 307,000 205,000
Finite-lived intangible assets, net book value 1,127,000 1,229,000 1,127,000 1,229,000
Finite-lived intangible asset, useful life     7 years  
Intangibles - tradenames and trademarks
        
Acquired Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible assets, cost 344,000 344,000 344,000 344,000
Finite-lived intangible assets, accumulated amortization 74,000 49,000 74,000 49,000
Finite-lived intangible assets, net book value 270,000 295,000 270,000 295,000
Finite-lived intangible asset, useful life     7 years  
Patents
        
Acquired Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible assets, cost 706,000 703,000 706,000 703,000
Finite-lived intangible assets, accumulated amortization 256,000 267,000 256,000 267,000
Finite-lived intangible assets, net book value 450,000 436,000 450,000 436,000
Finite-lived intangible asset, useful life     7 years  
Intellectual property
        
Acquired Finite-Lived Intangible Assets [Line Items]        
Finite-lived intangible assets, cost 20,000 20,000 20,000 20,000
Finite-lived intangible assets, accumulated amortization 6,000 5,000 6,000 5,000
Finite-lived intangible assets, net book value $ 14,000 $ 15,000 $ 14,000 $ 15,000
Finite-lived intangible asset, useful life     10 years