Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Segment Information - Summary of Segment Information (Detail)

v3.10.0.1
Segment Information - Summary of Segment Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Revenues [Abstract]                      
Total Revenue $ 76,475 $ 69,097 $ 67,746 $ 63,423 $ 61,422 $ 59,137 $ 62,264 $ 57,428 $ 276,741 $ 240,251 $ 231,808
Cost of Goods and Services Sold [Abstract]                      
Cost of revenue                 149,476 138,295 133,704
Gross Profit [Abstract]                      
Gross Profit $ 37,111 $ 32,321 $ 30,530 $ 27,303 $ 26,762 $ 24,895 $ 27,352 $ 22,948 127,265 101,956 98,104
Clinical Services Segment [Member]                      
Revenues [Abstract]                      
Total Revenue                 241,873 213,097 210,159
Cost of Goods and Services Sold [Abstract]                      
Cost of revenue                 128,297 121,785 120,437
Gross Profit [Abstract]                      
Gross Profit                 113,576 91,313 89,722
Pharma Services Segment [Member]                      
Revenues [Abstract]                      
Total Revenue                 34,868 27,154 21,649
Cost of Goods and Services Sold [Abstract]                      
Cost of revenue                 21,179 16,510 13,267
Gross Profit [Abstract]                      
Gross Profit                 $ 13,689 $ 10,643 $ 8,382