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, as well as 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 December 31,				Six Months Ended December 31,
	2017		2018		2017		2018
Revenues (1) — by Segment:
Security division	$	172,269	$	188,684	$	334,514	$	358,644
Healthcare division		52,506		51,559		98,035		89,832
Optoelectronics and Manufacturing division, including intersegment revenues		63,886		72,019		122,812		142,973
Intersegment revenues elimination		(11,133)		(9,057)		(20,700)		(21,995)
Total	$	277,528	$	303,205	$	534,661	$	569,454


	Three Months Ended December 31,				Six Months Ended December 31,
	2017		2018		2017		2018
Income (loss) from operations — by Segment:
Security division	$	22,471	$	26,063	$	45,164	$	49,113
Healthcare division		603		2,209		1,450		334
Optoelectronics and Manufacturing division		4,502		8,067		9,677		14,892
Corporate		(9,118)		(4,560)		(17,871)		(15,911)
Eliminations (2)		(311)		(72)		(879)		(464)
Total	$	18,147	$	31,707	$	37,541	$	47,964


	June 30,		December 31,
	2018		2018
Assets — by Segment:
Security division	$	804,527	$	804,390
Healthcare division		167,611		161,521
Optoelectronics and Manufacturing division		220,373		246,076
Corporate		66,453		89,220
Eliminations (2)		(3,273)		(3,530)
Total	$	1,255,691		1,297,677

(1)

For each of the three and six months ended December 31, 2017, one customer, Servicio de Administactión Tributaria (“SAT”) in Mexico, accounted for 12% of total net revenues. For the three and six months ended December 31, 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.