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INTANGIBLES AND OTHER ASSETS (Details) (USD $)
 3 Months Ended 6 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Jun. 30, 2014
Service life
Jun. 30, 2014
Acquired technology
Dec. 31, 2013
Acquired technology
Jun. 30, 2014
Acquired technology
Minimum
Jun. 30, 2014
Acquired technology
Maximum
Jun. 30, 2014
Assay royalties
Dec. 31, 2013
Assay royalties
Jun. 30, 2014
Third party payor relationships
Dec. 31, 2013
Third party payor relationships
Jun. 30, 2014
Tradenames and trademarks
Dec. 31, 2013
Tradenames and trademarks
Jun. 30, 2014
Customer relationships
Dec. 31, 2013
Customer relationships
Jun. 30, 2014
Covenants not to compete
Dec. 31, 2013
Covenants not to compete
Jun. 30, 2014
Patents
Dec. 31, 2013
Patents
Jun. 30, 2014
Intellectual property
Dec. 31, 2013
Intellectual property
Acquired Finite-Lived Intangible Assets [Line Items]                                                
Finite-lived intangible assets, cost $ 13,952,000   $ 13,952,000   $ 13,793,000   $ 9,009,000 $ 9,009,000     $ 1,434,000 $ 1,434,000 $ 367,000 $ 367,000 $ 824,000 $ 824,000 $ 652,000 $ 652,000 $ 184,000 $ 184,000 $ 1,216,000 $ 1,153,000 $ 266,000 $ 170,000
Finite-lived intangible assets, accumulated amortization 5,287,000   5,287,000   4,598,000   3,586,000 3,175,000     717,000 614,000 86,000 73,000 292,000 233,000 76,000 54,000 107,000 77,000 372,000 336,000 51,000 36,000
Finite-lived intangible assets, net book value 8,665,000   8,665,000   9,195,000   5,423,000 5,834,000     717,000 820,000 281,000 294,000 532,000 591,000 576,000 598,000 77,000 107,000 844,000 817,000 215,000 134,000
Finite-lived intangible asset, useful life             10 years 7 years 7 years 10 years 7 years   15 years   7 years   15 years   3 years       7 years  
Amortization of intangible assets 300,000 500,000 700,000 900,000                                        
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]                                                
Amortization expense, 2014 1,400,000   1,400,000                                          
Amortization expense, 2015 1,400,000   1,400,000                                          
Amortization expense, 2016 1,300,000   1,300,000                                          
Amortization expense, 2017 1,300,000   1,300,000                                          
Amortization expense, 2018 1,000,000   1,000,000                                          
Income (loss) from continuing operations           100,000                                    
Net income (loss)           $ 100,000                                    
Earnings per share, basic and diluted $ (0.57) [1] $ (0.41) [1] $ (1.17) $ (0.95)   $ 0.01                                    
[1] Net loss per share and the number of shares used in the per share calculations for all periods presented reflect the one-for-twelve reverse stock split that took effect on January 27, 2014.