XML 35 R25.htm IDEA: XBRL DOCUMENT v3.3.1.900
Segment Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Nov. 30, 2015
Nov. 30, 2014
Nov. 30, 2015
Nov. 30, 2014
May. 31, 2015
Segment Reporting Information [Line Items]          
Product revenues to external customers $ 68,717 $ 59,824 $ 133,754 $ 118,048  
Service revenues to external customers 10,893 8,631 20,717 18,006  
Total revenues to external customers 79,610 68,455 154,471 136,054  
Operating income (loss) 14,612 12,897 29,507 26,336  
Total assets 425,783 365,917 425,783 365,917 $ 392,181
Operating Segments | Food Safety          
Segment Reporting Information [Line Items]          
Product revenues to external customers 34,682 30,351 66,733 58,414  
Service revenues to external customers 2,572 2,604 4,981 5,504  
Total revenues to external customers 37,254 32,955 71,714 63,918  
Operating income (loss) 7,687 8,196 16,108 15,712  
Total assets 132,472 107,777 132,472 107,777  
Operating Segments | Animal Safety          
Segment Reporting Information [Line Items]          
Product revenues to external customers 34,035 29,473 67,021 59,634  
Service revenues to external customers 8,321 6,027 15,736 12,502  
Total revenues to external customers 42,356 35,500 82,757 72,136  
Operating income (loss) 7,833 5,436 15,173 12,141  
Total assets 182,478 175,038 182,478 175,038  
Corporate and Eliminations          
Segment Reporting Information [Line Items]          
Product revenues to external customers [1] 0 0 0 0  
Service revenues to external customers [1] 0 0 0 0  
Total revenues to external customers [1] 0 0 0 0  
Operating income (loss) [1] (908) (735) (1,774) (1,517)  
Total assets [1] $ 110,833 $ 83,102 $ 110,833 $ 83,102  
[1] Includes corporate assets, consisting principally of cash and cash equivalents, marketable securities, deferred assets and overhead expenses not allocated to specific business segments. Also includes the elimination of intersegment transactions.