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 anesthesia 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 product segments. Both the Security and Healthcare divisions comprise primarily end product businesses whereas the businesses of the Optoelectronics and Manufacturing division primarily supply 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, 2017.

The following tables present the operations and identifiable assets by industry segment (in thousands):

	Three Months Ended September 30,
	2016			2017
Revenues (1) — by Segment:
Security division	$	123,709		$	162,245
Healthcare division	45,650			45,529
Optoelectronics and Manufacturing division, including intersegment revenues	56,954			58,926
Intersegment revenues elimination	(5,458		)	(9,567		)

Total	$	220,855		$	257,133

	Three Months Ended September 30,
	2016			2017
Operating income (loss) — by Segment:
Security division	$	9,350		$	22,693
Healthcare division	(3,264		)	847
Optoelectronics and Manufacturing division	4,650			5,175
Corporate	(9,013		)	(8,753		)
Eliminations (2)	376			(568		)

Total	$	2,099		$	19,394

	June 30,			September 30,
	2017			2017
Assets— by Segment:
Security division	$	785,230		$	899,035
Healthcare division	186,021			166,937
Optoelectronics and Manufacturing division	196,567			199,617
Corporate	64,959			89,192
Eliminations (2)	(2,690		)	(3,257		)

Total	$	1,230,087		$	1,351,524

(1)

For both of the three months ended September 30, 2016 and 2017, one customer, SAT in Mexico, accounted for approximately 13% 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.