5. SEGMENT INFORMATION

The Company’s reportable segments are strategic business units that offer different products and have varied customer bases. There are five reportable segments: Domestic, Export, IKONICS Imaging, DTX and AMS. Domestic sells screen printing film, emulsions, and inkjet receptive film to distributors located in the United States and Canada. IKONICS Imaging sells photo resistant film, art supplies, glass, metal medium and related abrasive etching equipment to end user customers located in the United States and Canada. AMS provides sound deadening technology to the aerospace industry along with products and services for etched composites, ceramics, glass and silicon wafers. DTX includes products and customers related to patented and proprietary inkjet technology used for mold texturing and prototyping. Export sells primarily the same products as Domestic and the IKONICS Imaging products not related to AMS or DTX. The accounting policies of the segments are the same as those described in the summary of significant accounting policies included in Note 1.

Management evaluates the performance of each segment based on the components of divisional income, and does not allocate assets and liabilities to segments except for trade receivables. Financial information with respect to the reportable segments follows:

For the year ended December 31, 2017:


					IKONICS
	Domestic		Export		Imaging		DTX		AMS		Unalloc.		Total
Net sales	$	6,934,433	$	4,722,950	$	4,021,970	$	817,640	$	746,251	$	—	$	17,243,244
Cost of goods sold		4,100,497		3,721,800		1,915,390		487,509		1,287,503		—		11,512,699
Gross profit (loss)		2,833,936		1,001,150		2,106,580		330,131		(541,252)		—		5,730,545
Selling, general, and administrative*		1,345,427		645,973		1,065,957		168,553		376,498		1,904,058		5,506,466
Research and development*		—		—		—		—		—		688,688		688,688
Income (loss) from operations	$	1,488,509	$	355,177	$	1,040,623	$	161,578	$	(917,750)	$	(2,592,746)	$	(464,609)

For the year ended December 31, 2016:


					IKONICS
	Domestic		Export		Imaging		DTX		AMS		Unalloc.		Total
Net sales	$	7,361,222	$	4,508,577	$	4,253,249	$	404,898	$	1,041,955	$	—	$	17,569,901
Cost of goods sold		4,203,125		3,501,769		1,906,664		162,376		1,559,057		—		11,332,991
Gross profit (loss)		3,158,097		1,006,808		2,346,585		242,522		(517,102)		—		6,236,910
Selling, general, and administrative*		1,396,266		650,513		1,052,823		144,970		419,469		1,947,808		5,611,849
Research and development*		—		—		—		—		—		647,065		647,065
Income (loss) from operations	$	1,761,831	$	356,295	$	1,293,762	$	97,552	$	(936,571)	$	(2,594,873)	$	(22,004)

*The Company does not allocate all general and administrative expenses or any research and development expenses to its operating segments for internal reporting.

Trade receivables by segment as of December 31, 2017 and December 31, 2016 were as follows:


	Dec 31, 2017		Dec 31, 2016

Domestic	$	1,119,228	$	1,206,866
Export		558,872		551,803
IKONICS Imaging		238,813		363,602
DTX		64,278		52,935
AMS		238,848		177,374
Unallocated		(29,779)		(16,079)

Total	$	2,190,260	$	2,336,501