XML 43 R29.htm IDEA: XBRL DOCUMENT v3.10.0.1
Segment Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Nov. 30, 2018
Feb. 28, 2018
Nov. 30, 2017
Nov. 30, 2018
Nov. 30, 2017
Feb. 28, 2018
May 31, 2018
May 31, 2017
Segment Reporting Information [Line Items]                
Product revenues to external customers $ 107,098   $ 100,698 $ 206,724 $ 194,907      
Operating income (loss) 18,246 $ 15,913 17,998 34,725 34,422 $ 50,335 $ 70,194 $ 64,945
Total assets 660,492   581,028 660,492 581,028   $ 618,009  
Operating Segments | Food Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 53,750   49,206 105,933 95,497      
Operating income (loss) 10,342   8,668 21,215 17,446      
Total assets 201,291   175,836 201,291 175,836      
Operating Segments | Animal Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 53,348   51,492 100,791 99,410      
Operating income (loss) 9,057   10,529 15,763 19,198      
Total assets 218,231   215,099 218,231 215,099      
Product Revenues                
Segment Reporting Information [Line Items]                
Product revenues to external customers 89,562   84,471 172,522 164,016      
Product Revenues | Operating Segments | Food Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 48,256   44,367 95,189 86,206      
Product Revenues | Operating Segments | Animal Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 41,306   40,104 77,333 77,810      
Service Revenues                
Segment Reporting Information [Line Items]                
Product revenues to external customers 17,536   16,227 34,202 30,891      
Service Revenues | Operating Segments | Food Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 5,494   4,839 10,744 9,291      
Service Revenues | Operating Segments | Animal Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 12,042   11,388 23,458 21,600      
Corporate and Eliminations                
Segment Reporting Information [Line Items]                
Operating income (loss) [1] (1,153)   (1,199) (2,253) (2,222)      
Total assets [1] $ 240,970   $ 190,093 $ 240,970 $ 190,093      
[1] Includes corporate assets, consisting principally of cash and cash equivalents, marketable securities, current and deferred tax accounts and overhead expenses not allocated to specific business segments. Also includes the elimination of intersegment transactions.