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INTANGIBLES AND OTHER ASSETS (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]          
Impairment of long-lived assets $ 7,024 $ 0 $ 7,024 $ 0  
Impairment charge related to property and equipment 900        
Impairment related to amortizable intangibles 6,100        
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 14,019   14,019   $ 13,551
Accumulated Amortization 6,854   6,854   5,672
Impairment Charge 6,165   6,165    
Net Book Value 1,000   1,000   7,879
Amortization expense for intangible assets 400 $ 400 1,100 $ 1,000  
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]          
Amortization expense, 2015 1,200   1,200    
Amortization expense, 2016 100   100    
Amortization expense, 2017 100   100    
Amortization expense, 2018 100   100    
Amortization expense, 2019 100   100    
Technology          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 9,009   9,009   9,009
Accumulated Amortization 4,611   4,611   3,995
Impairment Charge 4,398   4,398    
Net Book Value 0   $ 0   5,014
Technology | Minimum          
Finite-Lived Intangible Assets, Net [Abstract]          
Estimated Useful Life     7 years    
Technology | Maximum          
Finite-Lived Intangible Assets, Net [Abstract]          
Estimated Useful Life     10 years    
Assay royalties          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 1,434   $ 1,434   1,434
Accumulated Amortization 973   973   819
Impairment Charge 461   461    
Net Book Value 0   $ 0   615
Estimated Useful Life     7 years    
Third party payor relationships          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 367   $ 367   367
Accumulated Amortization 116   116   98
Impairment Charge 251   251    
Net Book Value 0   $ 0   269
Estimated Useful Life     15 years    
Tradenames and trademarks          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 824   $ 824   824
Accumulated Amortization 439   439   351
Impairment Charge 385   385    
Net Book Value 0   $ 0   473
Estimated Useful Life     7 years    
Customer relationships          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 652   $ 652   652
Accumulated Amortization 130   130   98
Impairment Charge 522   522    
Net Book Value 0   $ 0   554
Estimated Useful Life     15 years    
Covenants not to compete          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 184   $ 184   184
Accumulated Amortization 184   184   138
Impairment Charge 0   0    
Net Book Value 0   $ 0   46
Estimated Useful Life     3 years    
Patents          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 1,083   $ 1,083   815
Accumulated Amortization 229   229   87
Impairment Charge 148   148    
Net Book Value 706   706   728
Intellectual property          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 466   466   266
Accumulated Amortization 172   172   86
Impairment Charge 0   0    
Net Book Value $ 294   $ 294   $ 180
Estimated Useful Life     7 years