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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)
Revenue	$ 28,168	$ 21,872	$ 72,341	$ 61,080
Cost of revenue	17,035	14,294	47,664	42,222
Gross profit	11,133	7,578	24,677	18,858
Operating expenses:
Selling, general and administrative	4,484	3,313	12,219	10,106
Research and development	1,410	1,566	3,553	4,419
Restructuring charge				226
Total operating expenses	5,894	4,879	15,772	14,751
Income from operations	5,239	2,699	8,905	4,107
Interest income, net	122	105	334	303
Equity in loss of unconsolidated joint ventures	(266)	(581)	(1,387)	(1,437)
Other (expense) income, net	(349)	164	(403)	682
Income before provision for income taxes	4,746	2,387	7,449	3,655
Provision for income taxes	181	176	661	713
Net income	4,565	2,211	6,788	2,942
Less: Net loss attributable to noncontrolling interests	(146)	18	226	480
Net income attributable to AXT, Inc.	$ 4,419	$ 2,229	$ 7,014	$ 3,422
Net income attributable to AXT, Inc. per common share:
Basic (in dollars per share)	$ 0.11	$ 0.07	$ 0.19	$ 0.10
Diluted (in dollars per share)	$ 0.11	$ 0.07	$ 0.18	$ 0.10
Denominator:
Basic (in shares)	38,499	32,110	36,999	32,043
Diluted (in shares)	40,095	33,138	38,469	32,615

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1505-109256

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1448-109256

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration