XML 39 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
Aug. 31, 2018
Feb. 28, 2018
Nov. 30, 2017
Aug. 31, 2017
 [1]
Nov. 30, 2017
Feb. 28, 2018
May 31, 2018
May 31, 2017
Segment Reporting Information [Line Items]                
Product revenues to external customers $ 99,626     $ 94,209        
Operating income (loss) 16,479 $ 15,913 $ 17,998 16,424 $ 34,422 $ 50,335 $ 70,194 $ 64,945
Total assets 640,926     547,334     $ 618,009  
Product Revenues                
Segment Reporting Information [Line Items]                
Product revenues to external customers 82,960     79,545        
Service Revenues                
Segment Reporting Information [Line Items]                
Product revenues to external customers 16,666     14,664        
Operating Segments | Food Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 52,183     46,291        
Operating income (loss) 10,873     8,777        
Total assets 201,727     194,857        
Operating Segments | Animal Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 47,443     47,918        
Operating income (loss) 6,706     8,669        
Total assets 212,786     209,404        
Operating Segments | Product Revenues | Food Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 46,933     41,839        
Operating Segments | Product Revenues | Animal Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 36,027     37,706        
Operating Segments | Service Revenues | Food Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 5,250     4,452        
Operating Segments | Service Revenues | Animal Safety                
Segment Reporting Information [Line Items]                
Product revenues to external customers 11,416     10,212        
Corporate and Eliminations                
Segment Reporting Information [Line Items]                
Operating income (loss) [2] (1,100)     (1,022)        
Total assets [2] $ 226,413     $ 143,073        
[1] Segment revenues for the three months ended August 31, 2017 have been revised as discussed in Note 1. For the three month period ended August 31, 2017, product revenues were reduced by $443,000 in the Food Safety segment and $579,000 in the Animal Safety segment; service revenues were unchanged in the Food Safety Segment and were reduced by $25,000 in the Animal Safety segment.
[2] 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.