4. SEGMENT INFORMATION AND GEOGRAPHIC DATA

We have two reportable segments: Food Safety and Animal Safety. The Food Safety segment is primarily engaged in the development, production and marketing of diagnostic test kits, culture media and related products used by food producers and processors to detect harmful natural toxins, foodborne bacteria, allergens and levels of general sanitation. The Animal Safety segment is primarily engaged in the development, production and marketing of products dedicated to animal safety, including a complete line of consumable products marketed to veterinarians and animal health product distributors; this segment also provides genomic identification and related interpretive bioinformatic services. Additionally, the Animal Safety segment produces and markets rodenticides, disinfectants and insecticides to assist in the control of rodents, insects and disease in and around agricultural, food production and other facilities.

Our international operations in the United Kingdom, Mexico, Brazil, China and India originally focused on the Company’s Food Safety products, and each of these units reports through the Food Safety segment. In recent years, these operations have expanded to offer our complete line of products and services, including those usually associated with the Animal Safety segment such as cleaners, disinfectants, rodenticides, insecticides, veterinary instruments and genomics services. These additional products and services are managed and directed by existing management and are reported through the Food Safety segment.

The accounting policies of each of the segments are the same as those described in Note 1.

Segment information follows:


	Food Safety		Animal Safety		Corporate and Eliminations (1)			Total
	(in thousands)
As of and for the three months ended November 30, 2018
Product revenues to external customers	$	48,256	$	41,306	$	—		$	89,562
Service revenues to external customers		5,494		12,042		—			17,536

Total revenues to external customers		53,750		53,348		—			107,098
Operating income (loss)		10,342		9,057		(1,153	)		18,246
Total assets		201,291		218,231		240,970			660,492

As of and for the three months ended November 30, 2017—Revised (2)
Product revenues to external customers	$	44,367	$	40,104	$	—		$	84,471
Service revenues to external customers		4,839		11,388		—			16,227

Total revenues to external customers		49,206		51,492		—			100,698
Operating income (loss)		8,668		10,529		(1,199	)		17,998
Total assets		175,836		215,099		190,093			581,028

(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.

(2)

Segment revenues for the three months ended November 30, 2017 have been revised as discussed in Note 1. For the three months ended November 30, 2017, product revenues were reduced by $354,000 in the Food Safety segment and $765,000 in the Animal Safety segment; service revenues were unchanged in the Food Safety segment and in the Animal Safety segment.


	Food Safety		Animal Safety		Corporate and Eliminations (1)			Total
	(in thousands)
For the six months ended November 30, 2018
Product revenues to external customers	$	95,189	$	77,333	$	—		$	172,522
Service revenues to external customers		10,744		23,458		—			34,202

Total revenues to external customers		105,933		100,791		—			206,724
Operating income (loss)		21,215		15,763		(2,253	)		34,725
For the six months ended November 30, 2017—Revised (2)
Product revenues to external customers	$	86,206	$	77,810	$	—		$	164,016
Service revenues to external customers		9,291		21,600		—			30,891

Total revenues to external customers		95,497		99,410		—			194,907
Operating income (loss)		17,446		19,198		(2,222	)		34,422

(1)	Includes the elimination of intersegment transactions.

(2)

Segment revenues for the six months ended November 30, 2017 have been revised as discussed in Note 1. For the six months ended November 30, 2017, product revenues were reduced by $798,000 in the Food Safety segment and $1,343,000 in the Animal Safety segment; service revenues were unchanged in the Food Safety segment and reduced by $25,000 in the Animal Safety segment.

The following table presents the Company’s revenue disaggregated by geographic location:


	Three Months ended				Six Months Ended
	November 30,				November 30,
	2018		2017		2018		2017
	(in thousands)				(in thousands)
Revenues by Geographic Location
Domestic	$	65,033	$	62,452	$	124,879	$	122,588
International		42,065		38,246		81,845		72,319

Total revenue		107,098		100,698		206,724		194,907