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Segment Information (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
segment
Mar. 31, 2017
USD ($)
Segment Reporting [Abstract]    
Number of operating segments | segment 2  
Segment Reporting Information [Line Items]    
Revenues $ 63,423 $ 57,428
Cost of Revenue 36,120 34,480
GROSS PROFIT 27,303 22,948
General and administrative 17,067 17,018
Research and development 956 862
Sales and marketing 6,775 5,648
Total operating expenses 24,798 23,528
Income (Loss) From Operations 2,505 (580)
Interest expense, net (1,486) (1,364)
Other income 63 0
Income (loss) before taxes 1,082 (1,944)
Income tax (benefit) expense 438 (779)
Net income (loss) 644 (1,165)
Clinical Services    
Segment Reporting Information [Line Items]    
Revenues 56,971 52,907
Cost of Revenue 31,042 30,700
GROSS PROFIT 25,929 22,207
Pharma Services    
Segment Reporting Information [Line Items]    
Revenues 6,452 4,521
Cost of Revenue 5,078 3,780
GROSS PROFIT $ 1,374 $ 741