XML 36 R26.htm IDEA: XBRL DOCUMENT v3.6.0.2
Segment Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Nov. 30, 2016
Nov. 30, 2015
Nov. 30, 2016
Nov. 30, 2015
May 31, 2016
Segment Reporting Information [Line Items]          
Product revenues to external customers $ 76,961 $ 68,717 $ 149,206 $ 133,754  
Service revenues to external customers 13,756 10,893 25,156 20,717  
Total revenues to external customers 90,717 79,610 174,362 154,471  
Operating income (loss) 16,852 14,612 31,594 29,507  
Total assets 487,311 425,783 487,311 425,783 $ 451,715
Operating Segments | Food Safety          
Segment Reporting Information [Line Items]          
Product revenues to external customers 37,279 34,682 72,921 66,733  
Service revenues to external customers 3,482 2,572 6,843 4,981  
Total revenues to external customers 40,761 37,254 79,764 71,714  
Operating income (loss) 8,979 7,687 17,062 16,108  
Total assets 142,303 132,472 142,303 132,472  
Operating Segments | Animal Safety          
Segment Reporting Information [Line Items]          
Product revenues to external customers 39,682 34,035 76,285 67,021  
Service revenues to external customers 10,274 8,321 18,313 15,736  
Total revenues to external customers 49,956 42,356 94,598 82,757  
Operating income (loss) 8,998 7,833 16,694 15,173  
Total assets 217,572 182,478 217,572 182,478  
Corporate and Eliminations          
Segment Reporting Information [Line Items]          
Operating income (loss) [1] (1,125) (908) (2,162) (1,774)  
Total assets [1] $ 127,436 $ 110,833 $ 127,436 $ 110,833  
[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.