11. Segment Information

We have determined that we operate in three identifiable industry segments: (a) security and inspection systems (Security division), (b) medical monitoring and diagnostic cardiology systems (Healthcare division) and (c) optoelectronic devices and manufacturing (Optoelectronics and Manufacturing division). We also have a corporate segment (Corporate) that includes executive compensation and certain other general and administrative expenses; expenses related to stock issuances and legal, audit and other professional service fees not allocated to industry segments. Both the Security and Healthcare divisions comprise primarily end-product businesses whereas the Optoelectronics and Manufacturing division primarily supplies components and subsystems to OEM customers, including to the Security and Healthcare divisions. Sales between divisions are at transfer prices that approximate market values. All other accounting policies of the segments are the same as described in Note 1, Summary of Significant Accounting Policies of the Form 10-K for the fiscal year ended June 30, 2018.

The following tables set forth the results of operations and identifiable assets by industry segment (in thousands):


	Three Months Ended September 30,
	2017		2018
Revenues (1)—by Segment:
Security division	$	162,245	$	169,960
Healthcare division		45,529		38,273
Optoelectronics and Manufacturing division, including intersegment revenues		58,926		70,954
Intersegment revenues elimination		(9,567)		(12,938)
Total	$	257,133	$	266,249


	Three Months Ended September 30,
	2017		2018
Income (Loss) from Operations—by Segment:
Security division	$	22,693	$	23,050
Healthcare division		847		(1,875)
Optoelectronics and Manufacturing division		5,175		6,825
Corporate		(8,753)		(11,351)
Intersegment eliminations (2)		(568)		(392)
Total	$	19,394	$	16,257


	June 30,		September 30,
	2018		2018
Assets—by Segment:
Security division	$	804,527	$	824,528
Healthcare division		167,611		167,913
Optoelectronics and Manufacturing division		220,373		245,287
Corporate		66,453		93,648
Intersegment eliminations (2)		(3,273)		(3,448)
Total	$	1,255,691	$	1,327,928

(1)

For the three months ended September 30, 2017, one customer, Servicio de Administración Tributaria (“SAT”) in Mexico, accounted for approximately 13% of total net revenues. For the three months ended September 30, 2018, no customer accounted for greater than 10% of total net revenues.

(2)

Eliminations within operating income primarily reflect the change in the elimination of intercompany profit in inventory not-yet-realized. Eliminations in assets reflect the amount of intercompany profits in inventory as of the balance sheet date. Such intercompany profit will be realized when inventory is shipped to the external customers of the Security and Healthcare divisions.