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INTANGIBLES AND OTHER ASSETS (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]          
Cost $ 14,181   $ 14,181   $ 13,934
Accumulated Amortization 6,632   6,632   5,970
Net Book Value 7,549   7,549   7,964
Amortization of intangible assets 400 $ 300 800 $ 700  
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]          
Amortization expense, 2015 1,400   1,400    
Amortization expense, 2016 1,400   1,400    
Amortization expense, 2017 1,400   1,400    
Amortization expense, 2018 1,100   1,100    
Amortization expense, 2019 900   900    
Technology          
Acquired Finite-Lived Intangible Assets [Line Items]          
Cost 9,009   9,009   9,009
Accumulated Amortization 4,406   4,406   3,995
Net Book Value 4,603   $ 4,603   5,014
Technology | Minimum          
Acquired Finite-Lived Intangible Assets [Line Items]          
Finite-lived intangible asset, useful life     7 years    
Technology | Maximum          
Acquired Finite-Lived Intangible Assets [Line Items]          
Finite-lived intangible asset, useful life     10 years    
Assay Royalties          
Acquired Finite-Lived Intangible Assets [Line Items]          
Cost 1,434   $ 1,434   1,434
Accumulated Amortization 922   922   819
Net Book Value 512   $ 512   615
Finite-lived intangible asset, useful life     7 years    
Third Party Payor Relationships          
Acquired Finite-Lived Intangible Assets [Line Items]          
Cost 367   $ 367   367
Accumulated Amortization 110   110   98
Net Book Value 257   $ 257   269
Finite-lived intangible asset, useful life     15 years    
Tradenames and Trademarks          
Acquired Finite-Lived Intangible Assets [Line Items]          
Cost 824   $ 824   824
Accumulated Amortization 409   409   351
Net Book Value 415   $ 415   473
Finite-lived intangible asset, useful life     7 years    
Customer Relationships          
Acquired Finite-Lived Intangible Assets [Line Items]          
Cost 652   $ 652   652
Accumulated Amortization 120   120   98
Net Book Value 532   $ 532   554
Finite-lived intangible asset, useful life     15 years    
Covenants Not to Compete          
Acquired Finite-Lived Intangible Assets [Line Items]          
Cost 184   $ 184   184
Accumulated Amortization 169   169   138
Net Book Value 15   $ 15   46
Finite-lived intangible asset, useful life     3 years    
Patents          
Acquired Finite-Lived Intangible Assets [Line Items]          
Cost 1,245   $ 1,245   1,198
Accumulated Amortization 357   357   385
Net Book Value 888   888   813
Intellectual Property          
Acquired Finite-Lived Intangible Assets [Line Items]          
Cost 466   466   266
Accumulated Amortization 139   139   86
Net Book Value $ 327   $ 327   $ 180
Finite-lived intangible asset, useful life     7 years